Improve Rust analysis PR check

Also run the `rust` checks on "milestone" CLI releases, to ensure we
remain backward compatible with those versions. This was prompted by
https://github.com/github/codeql-action/pull/2960#pullrequestreview-3104730221

Running this on current `main` and then on that PR should improve our
confidence we remain backward compatible.

It also turns out a probable `ruamel.yaml` update was changing a lot of
generated workflows, so I've:
* fixed the `ruamel.yaml` version to the latest in `sync.sh`
* added `yaml.width = 120` in `sync.py` to minimize (but not entirely
  remove) the number of changes
* checked in the workflows whose formatting was changed by the new
  `ruamel.yaml` version

.github/workflows/__packaging-inputs-js.yml

@@ -70,7 +70,8 @@ jobs:
         with:
           config-file: .github/codeql/codeql-config-packaging2.yml
           languages: javascript
-          packs: codeql-testing/codeql-pack1@1.0.0, codeql-testing/codeql-pack2, codeql-testing/codeql-pack3:other-query.ql
+          packs: codeql-testing/codeql-pack1@1.0.0, codeql-testing/codeql-pack2,
+            codeql-testing/codeql-pack3:other-query.ql
           tools: ${{ steps.prepare-test.outputs.tools-url }}
       - name: Build code
         shell: bash