Update release note generation to match new Jaspr architecture (#9514)

packages/devtools_app/lib/src/framework/release_notes.dart

diff --git a/packages/devtools_app/lib/src/framework/release_notes.dart b/packages/devtools_app/lib/src/framework/release_notes.dart
index b6a05b1..f6ea52c 100644
--- a/packages/devtools_app/lib/src/framework/release_notes.dart
+++ b/packages/devtools_app/lib/src/framework/release_notes.dart
@@ -27,7 +27,7 @@
 // To load markdown from a staged flutter website, set this string to the url
 // from the flutter/website PR, which has a GitHub action that automatically
 // stages commits to firebase. Example:
-// https://flutter-docs-prod--pr8928-dt-notes-links-b0b33er1.web.app/tools/devtools/release-notes/release-notes-2.24.0-src.md.
+// https://flutter-docs-prod--pr12652-devtools-release-notes-2-52-3bbb8c0u.web.app/tools/devtools/release-notes/release-notes-2.52.0.md.
 String? _debugReleaseNotesUrl;
 
 const releaseNotesKey = Key('release_notes');

packages/devtools_app/release_notes/README.md

diff --git a/packages/devtools_app/release_notes/README.md b/packages/devtools_app/release_notes/README.md
index ea343c4..62b8245 100644
--- a/packages/devtools_app/release_notes/README.md
+++ b/packages/devtools_app/release_notes/README.md
@@ -70,11 +70,10 @@
 Once you push up your branch to `flutter/website` and open your PR,
 wait for the `github-actions` bot to stage your changes to Firebase.
 Open the link it comments and navigate to the release notes you want to test.
-Be sure to add `-src.md` to the url to get the raw json.
 The url should look something like:
 
 ```
-https://flutter-docs-prod--pr8928-dt-notes-links-b0b33er1.web.app/tools/devtools/release-notes/release-notes-2.24.0-src.md
+https://flutter-docs-prod--pr12652-devtools-release-notes-2-52-3bbb8c0u.web.app/tools/devtools/release-notes/release-notes-2.52.0.md
 ```
 
 - Copy this url and set `_debugReleaseNotesUrl` in

tool/lib/commands/release_notes_helper.dart

diff --git a/tool/lib/commands/release_notes_helper.dart b/tool/lib/commands/release_notes_helper.dart
index 673e01f..494447e 100644
--- a/tool/lib/commands/release_notes_helper.dart
+++ b/tool/lib/commands/release_notes_helper.dart
@@ -107,27 +107,10 @@
     }
 
     // Write the 'release-notes-<x.y.z>.md' file.
-    File(
-        p.join(
-          websiteReleaseNotesDir.path,
-          'release-notes-$releaseNotesVersion.md',
-        ),
-      )
-      ..createSync()
-      ..writeAsStringSync('''---
-short-title: $releaseNotesVersion release notes
-description: Release notes for Dart and Flutter DevTools version $releaseNotesVersion.
-toc: false
----
-
-{% include ./release-notes-$releaseNotesVersion-src.md %}
-''', flush: true);
-
-    // Create the 'release-notes-<x.y.z>-src.md' file.
-    final releaseNotesSrcMd = File(
+    final releaseNotesMd = File(
       p.join(
         websiteReleaseNotesDir.path,
-        'release-notes-$releaseNotesVersion-src.md',
+        'release-notes-$releaseNotesVersion.md',
       ),
     )..createSync();
 
@@ -159,30 +142,22 @@
       }
     }
 
-    // Write the 'release-notes-<x.y.z>-src.md' file, including any updates for
+    final metadataHeader = '''---
+title: DevTools $releaseNotesVersion release notes
+short-title: $releaseNotesVersion release notes
+breadcrumb: $releaseNotesVersion
+toc: false
+---
+
+''';
+
+    // Write the 'release-notes-<x.y.z>.md' file, including any updates for
     // image paths.
-    releaseNotesSrcMd.writeAsStringSync(
-      srcLines.joinWithNewLine(),
+    releaseNotesMd.writeAsStringSync(
+      metadataHeader + srcLines.joinWithNewLine(),
       flush: true,
     );
 
-    // Write the 'devtools_releases.yml' file.
-    final releasesYml = File(
-      p.join(websiteRepoPath, 'src', '_data', 'devtools_releases.yml'),
-    );
-    if (!releasesYml.existsSync()) {
-      throw FileSystemException(
-        'The devtools_releases.yml file does not exist.',
-        releasesYml.path,
-      );
-    }
-    final releasesYmlContent = releasesYml.readAsStringSync().replaceFirst(
-      'releases:',
-      '''releases:
-  - '$releaseNotesVersion\'''',
-    );
-    releasesYml.writeAsStringSync(releasesYmlContent, flush: true);
-
     const firstPartInstructions =
         'Release notes successfully drafted in a local flutter/website branch. '
         'Please clean them up by deleting empty sections and fixing any '
@@ -192,7 +167,7 @@
 $firstPartInstructions
 
 cd $websiteRepoPath;
-code ${releaseNotesSrcMd.absolute.path}
+code ${releaseNotesMd.absolute.path}
 
 Create a PR on the flutter/website repo when you are finished.
 ''');