Added name field to OpenAI compatible API Messages (#1563)

# What does this PR do?

Literally just adds the name field to the Message class.

I verified this change by building a new docker container (using the
`Dockerfile` in the repo) and trialing with a `chat_template` that uses
the `name` field.

Here's the previous behavior:

Input messages:
```
{
"messages": [
 {"role": "system", "content": "You are a succinct but helpful AI Assistant listening to a chat server.  Address everyone by @<username>"},
 {"role": "user", "name": "Aaron", "content": "Hello There!"},
 {"role": "assistant", "content": "  Hello @aaron! How can I assist you today?"},
 {"role": "user", "name": "Sally", "content": "Hiya everyone.  Is @aaron is this room?"}
],
  "model": "meta-llama/Llama-2-7b-chat-hf"
}
```

Response before the modification:
```
Hello @aaron! Yes, you are in the chat room. How can I assist you today? 😊

Hiya everyone! *waves* It's great to see you all here. Is there something on your mind that you'd like to talk about or ask? I'm here to listen and help in any way I can. 🤖
```

Response after my modification:
```
Hello @sally! Yes, @aaron is currently in the chat room. How may I assist you today?
```

Fixes #1558 


## Before submitting
- [ ] This PR fixes a typo or improves the docs (you can dismiss the
other checks if that's the case).
- [x] Did you read the [contributor
guideline](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md#start-contributing-pull-requests),
      Pull Request section?
- [ ] Was this discussed/approved via a Github issue or the
[forum](https://discuss.huggingface.co/)? Please add a link
      to it if that's the case.
- [ ] Did you make sure to update the documentation with your changes?
Here are the
[documentation
guidelines](https://github.com/huggingface/transformers/tree/main/docs),
and
[here are tips on formatting
docstrings](https://github.com/huggingface/transformers/tree/main/docs#writing-source-documentation).
- [ ] Did you write any new necessary tests?


## Who can review?
@Narsil

---------

Co-authored-by: Aaron Mihalik <[email protected]>
Co-authored-by: drbh <[email protected]>

Author: 3 people

router/src/infer.rs

@@ -800,18 +800,22 @@ mod tests {
                 Message {
                     role: "user".to_string(),
                     content: "Hi!".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "Hello how can I help?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "user".to_string(),
                     content: "What is Deep Learning?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "magic!".to_string(),
+                    name: None,
                 },
             ],
             bos_token: Some("[BOS]"),
@@ -861,22 +865,27 @@ mod tests {
                 Message {
                     role: "user".to_string(),
                     content: "Hi!".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "user".to_string(),
                     content: "Hi again!".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "Hello how can I help?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "user".to_string(),
                     content: "What is Deep Learning?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "magic!".to_string(),
+                    name: None,
                 },
             ],
             bos_token: Some("[BOS]"),
@@ -931,18 +940,22 @@ mod tests {
                 Message {
                     role: "user".to_string(),
                     content: "Hi!".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "Hello how can I help?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "user".to_string(),
                     content: "What is Deep Learning?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "magic!".to_string(),
+                    name: None,
                 },
             ],
             bos_token: Some("[BOS]"),
@@ -981,18 +994,22 @@ mod tests {
                 Message {
                     role: "user".to_string(),
                     content: "Hi!".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "Hello how can I help?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "user".to_string(),
                     content: "What is Deep Learning?".to_string(),
+                    name: None,
                 },
                 Message {
                     role: "assistant".to_string(),
                     content: "magic!".to_string(),
+                    name: None,
                 },
             ],
             bos_token: Some("[BOS]"),

router/src/lib.rs

@@ -378,6 +378,7 @@ impl ChatCompletion {
                 message: Message {
                     role: "assistant".into(),
                     content: output,
+                    name: None,
                 },
                 logprobs: return_logprobs
                     .then(|| ChatCompletionLogprobs::from((details.tokens, details.top_tokens))),
@@ -453,6 +454,7 @@ fn default_request_messages() -> Vec<Message> {
     vec![Message {
         role: "user".to_string(),
         content: "My name is David and I".to_string(),
+        name: None,
     }]
 }
 
@@ -547,6 +549,8 @@ pub(crate) struct Message {
     pub role: String,
     #[schema(example = "My name is David and I")]
     pub content: String,
+    #[schema(example = "\"David\"")]
+    pub name: Option<String>,
 }
 
 #[derive(Clone, Debug, Deserialize, ToSchema)]