Disable the unstable template checks and prepare for 2.14 stable. (#2752)

* Disable one of the template checks?  and add beta branch for testing

* beta is the new stable

* empty commit - force check reset

Author: jcollins-g

.github/workflows/test.yaml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        sdk: [dev, stable]
+        sdk: [dev, beta]
         job: [main, flutter, sdk-analyzer, packages, sdk-docs]
         include:
           - os: macos-latest
@@ -32,9 +32,9 @@ jobs:
             # Do not try to run flutter against the "stable" sdk,
             # it is unlikely to work and produces uninteresting
             # results.
-          - sdk: stable
+          - sdk: beta
             job: flutter
-          - sdk: stable
+          - sdk: beta
             job: sdk-analyzer
 
     steps:

tool/grind.dart

@@ -1056,7 +1056,8 @@ final _generatedFilesList = <String>[
   'src/generator/html_resources.g.dart',
   'src/generator/templates.aot_renderers_for_html.dart',
   'src/generator/templates.aot_renderers_for_md.dart',
-  'src/generator/templates.runtime_renderers.dart',
+  // TODO(jcollins-g): https://github.com/dart-lang/dartdoc/issues/2751
+  //'src/generator/templates.runtime_renderers.dart',
   'src/version.dart',
   '../test/mustachio/foo.dart',
 ].map((s) => path.joinAll(path.posix.split(s)));