Reverts "Reland licenses cpp switch 3 (flutter#173063)" (flutter#173113)

<!-- start_original_pr_link -->
Reverts: flutter#173063
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<!-- start_initiating_author -->
Initiated by: gaaclarke
<!-- end_initiating_author -->
<!-- start_revert_reason -->
Reason for reverting: Again failing out because pkg-config is not
present on the host machine.
<!-- end_revert_reason -->
<!-- start_original_pr_author -->
Original PR Author: gaaclarke
<!-- end_original_pr_author -->

<!-- start_reviewers -->
Reviewed By: {jtmcdole, jason-simmons}
<!-- end_reviewers -->

<!-- start_revert_body -->
This change reverts the following previous change:
reland of flutter#173059

Unfortunately we don't have the ability to test the changes on the
autoroller bots beforehand, so we have to resort to landing new
attempts.

## changes since last revert
- Removed usage of `et`. That was doing a `gn desc` call which forced GN
to look for x11 for glfw which relies on `pkg-config` which doesn't
exist on those machines.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
on [Discord].

**Note**: The Flutter team is currently trialing the use of [Gemini Code
Assist for
GitHub](https://developers.google.com/gemini-code-assist/docs/review-github-code).
Comments from the `gemini-code-assist` bot should not be taken as
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useful you can update your code accordingly, but if you are unsure or
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<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

<!-- end_revert_body -->

Co-authored-by: auto-submit[bot] <[email protected]>

Author: 2 people

.autoroller-preupload.sh

@@ -2653,7 +2653,6 @@ Future<CommandResult> _runFlutterAnalyze(
 
 // These files legitimately require executable permissions
 const Set<String> kExecutableAllowlist = <String>{
-  '.autoroller-preupload.sh',
   'bin/dart',
   'bin/flutter',
   'bin/flutter-dev',

dev/bots/analyze.dart

@@ -6,32 +6,11 @@
     "cas_archive": false,
     "name": "licenses",
     "description": "Runs the license check script.",
-    "gn": [
-        "--target-dir",
-        "ci/host_release_licenses",
-        "--runtime-mode",
-        "release",
-        "--no-rbe",
-        "--no-goma"
-    ],
-    "ninja": {
-        "config": "ci/host_release_licenses",
-        "targets": [
-            "flutter/tools/licenses_cpp",
-            "flutter/tools/licenses_cpp:licenses_cpp_testrunner"
-        ]
-    },
     "tests": [
         {
-            "name": "Run license_cpp unittests",
-            "script": "out/ci/host_release_licenses/licenses_cpp_testrunner"
-        },
-        {
-            "name": "Run license_cpp",
-            "script": "flutter/ci/licenses_cpp.sh",
-            "parameters": [
-                "ci/host_release_licenses"
-            ]
+            "name": "licenses check",
+            "max_attempts": 1,
+            "script": "flutter/ci/licenses.sh"
         }
     ]
 }

engine/src/flutter/ci/builders/standalone/linux_license.json

@@ -64,7 +64,7 @@ DATA_DIR="$SCRIPT_DIR/../tools/licenses_cpp/data"
 # in the directory where you *run* the script from (your current working directory).
 LICENSES_OUTPUT_PATH="$SCRIPT_DIR/../sky/packages/sky_engine/LICENSE_CPP.new"
 
-LICENSES_PATH="$SCRIPT_DIR/../sky/packages/sky_engine/LICENSE"
+LICENSES_PATH="$SCRIPT_DIR/../sky/packages/sky_engine/LICENSE_CPP"
 
 # --- Validation ---