[v2] Remove opsworks and opsworks-cm clients (#9671)

Author: hssyoo

.changes/next-release/api-change-opsworks-55990.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``opsworks``",
+  "description": "The opsworks client has been removed following the deprecation of the service."
+}

.changes/next-release/api-change-opsworkscm-26546.json

@@ -0,0 +1,5 @@
+{
+  "type": "api-change",
+  "category": "``opsworks-cm``",
+  "description": "The opsworks-cm client has been removed following the deprecation of the service."
+}

awscli/botocore/data/endpoints.json

@@ -18009,22 +18009,6 @@
           }
         }
       },
-      "opsworks" : {
-        "endpoints" : {
-          "ap-southeast-1" : { },
-          "eu-central-1" : { },
-          "eu-west-1" : { },
-          "us-east-1" : { },
-          "us-west-2" : { }
-        }
-      },
-      "opsworks-cm" : {
-        "endpoints" : {
-          "ap-southeast-2" : { },
-          "eu-west-1" : { },
-          "us-east-1" : { }
-        }
-      },
       "organizations" : {
         "endpoints" : {
           "aws-global" : {