chore: revert "fix: Graceful shutdown for the API server (#18642) (#20981)" (cherry-pick #21221)

[gcp-cherry-pick-bot]

Cherry-picked Revert "fix: Graceful shutdown for the API server (#18642) (#20981)" (#21221)

[codecov]

Codecov Report

Attention: Patch coverage is 21.42857% with 22 lines in your changes missing coverage. Please review.

Project coverage is 53.13%. Comparing base (2ac03b5) to head (14f266c).
Report is 1 commits behind head on release-2.14.

Files with missing lines	Patch %	Lines
server/server.go	15.78%	16 Missing ⚠️
cmd/argocd-server/commands/argocd_server.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-2.14   #21222      +/-   ##
================================================
- Coverage         55.20%   53.13%   -2.08%     
================================================
  Files               338      338              
  Lines             57164    57075      -89     
================================================
- Hits              31560    30325    -1235     
- Misses            22913    24110    +1197     
+ Partials           2691     2640      -51     

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