Removing Torchserve tutorial per Tutorial audit T228122175

[AlannaBurke]

Fixes T228122175

Description

Removes recipes_source/torchserve_vertexai_tutorial.rst and references.

Checklist

• The issue that is being fixed is referred in the description (see above "Fixes #ISSUE_NUMBER")
• Only one issue is addressed in this pull request
• Labels from the issue that this PR is fixing are added to this pull request
• No unnecessary issues are included into this pull request.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3414

• 📄 Preview Python docs built from this PR

Note: Links to docs will display an error until the docs builds have been completed.

❌ 1 New Failure

As of commit a9cff5d with merge base 8a5c6f1 ():

NEW FAILURE - The following job has failed:

• link check on PR / linkChecker (gh)
  Process completed with exit code 1.

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