Wire up plugin for recording published versions; update autoinstaller bumping

[iclanton]

Summary

Wires up the @rushstack/rush-published-versions-json-plugin (added in #5701) for use in this repo's own publish pipeline, replacing the old repo-toolbox record-versions script. Also extends BumpDecoupledLocalDependencies to cover autoinstaller package.json files so their Rush-published dependencies stay in sync.

Details

Rush plugin wiring:

• Adds a plugins autoinstaller with @rushstack/rush-published-versions-json-plugin as its dependency.
• Registers the plugin in rush-plugins.json.
• Updates post-publish.yaml to invoke rush record-published-versions instead of calling repo-toolbox directly.
• Removes RecordVersionsAction from repo-toolbox since it is no longer needed.

Autoinstaller dep bumping:

• Extends BumpDecoupledLocalDependencies to scan all autoinstaller package.json files for dependencies on packages published from this repo, and bumps them alongside normal Rush project dependencies.
• Adds a rush update-autoinstaller --name plugins step to the post-publish pipeline so the plugins autoinstaller lockfile is kept up to date after each decoupled dep bump.

How it was tested

Reviewed the pipeline template and TypeScript changes manually. The plugin's record-published-versions command interface matches what was previously done by repo-toolbox record-versions.

Impacted documentation

No user-facing documentation is affected; these are internal pipeline and repo-script changes.