PMM-13643 stop watchtower on AMI/OVF

[BupycHuk]

PMM-13643

Link to the Feature Build: SUBMODULES-3817

If this PR adds or removes or alters one or more API endpoints, please review and add or update the relevant API documents as well:

• API Docs updated

If this PR is related to some other PRs in this or other repositories, please provide links to those PRs:

• Links to related pull requests (optional).
  PMM-13643 Stop watchtower after update. watchtower#8

[codecov]

Codecov Report

Attention: Patch coverage is 23.80952% with 16 lines in your changes missing coverage. Please review.

Please upload report for BASE (v3@50a8348). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
managed/services/server/updater.go	23.80%	16 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##             v3    #3444   +/-   ##
=====================================
  Coverage      ?   43.55%           
=====================================
  Files         ?      366           
  Lines         ?    44250           
  Branches      ?        0           
=====================================
  Hits          ?    19275           
  Misses        ?    23290           
  Partials      ?     1685           

Flag	Coverage Δ
managed	45.28% <23.80%> (?)

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