chore: more release setup updates

[Elizabeth Craig (ecraig12345)]

Pulling out more cleanup from the ESRP onboarding + pipeline move PR #36626.

Enhancements:

• Add dryrun_ to the titles of dry-run releases
• Update tag-react-components and deprecate-react-components-preview-packges to take the npm token via an environment variable (not an arg) and pass it to npm via environment variable
• Minor changes to tools.yml and variables.yml

Cleanup of unnecessary code (these are things I noticed while trying to determine which differences between the release pipelines were necessary or not):

• Remove usage of the release.vnext variable: previously it was used to control whether the tag-react-components script ran, but that's now handled in other ways.
• Removed post-publish syncpack check for vnext release, which appears to be unnecessary (it was added here in response to this comment, and the scenario appears to no longer be relevant since package versions in vr-tests-react-components are now *)
• Deleted the hotfix pipeline per discussions (it hasn't been used in multiple years and doesn't fit the new pattern)
• Removed the variable tags: production,externalfacing: I couldn't find any mentions of this on enghub, so I'm guessing it's from some outdated pipeline classification method and no longer needed?
• Remove the post-publish git reset --hard origin/somebranch step from the pipelines that don't need it

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Pull request demo site: URL

[Martin Hochel (Hotell)]

LGTM