Watch agent metadata service dynamically

[Future-Outlier]

Tracking issue

#3936

Why are the changes needed?

What changes were proposed in this pull request?

How was this patch tested?

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[codecov]

Codecov Report

Attention: Patch coverage is 24.13793% with 44 lines in your changes missing coverage. Please review.

Project coverage is 62.29%. Comparing base (25c3596) to head (992c3ab).
Report is 138 commits behind head on master.

Files with missing lines	Patch %	Lines
...yteplugins/go/tasks/plugins/webapi/agent/plugin.go	13.51%	32 Missing ⚠️
...yteplugins/go/tasks/plugins/webapi/agent/client.go	42.85%	10 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5392      +/-   ##
==========================================
+ Coverage   61.07%   62.29%   +1.22%     
==========================================
  Files         793      610     -183     
  Lines       51226    37574   -13652     
==========================================
- Hits        31288    23408    -7880     
+ Misses      17062    12035    -5027     
+ Partials     2876     2131     -745     

Flag	Coverage Δ
unittests-datacatalog	69.31% <ø> (ø)
unittests-flyteadmin	58.66% <ø> (-0.25%)	⬇️
unittests-flytecopilot	17.79% <ø> (ø)
unittests-flytectl	67.97% <ø> (ø)
unittests-flyteidl	79.04% <ø> (ø)
unittests-flyteplugins	61.75% <24.13%> (-0.20%)	⬇️
unittests-flytepropeller	?
unittests-flytestdlib	65.82% <ø> (ø)

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