chore: revert "feat: removed legacy app tracking label (#13203)" (cherry-pick #19196)

[gcp-cherry-pick-bot]

Cherry-picked Revert "feat: removed legacy app tracking label (#13203)" (#19196)

This reverts commit 4d8436b.

Signed-off-by: Michael Crenshaw 350466+crenshaw-dev@users.noreply.github.com

[codecov]

Codecov Report

Attention: Patch coverage is 63.41463% with 15 lines in your changes missing coverage. Please review.

Project coverage is 50.32%. Comparing base (cec8504) to head (69c09dc).
Report is 44 commits behind head on release-2.12.

Files with missing lines	Patch %	Lines
util/kube/kube.go	63.15%	7 Missing and 7 partials ⚠️
util/argo/resource_tracking.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release-2.12   #19200      +/-   ##
================================================
+ Coverage         50.30%   50.32%   +0.01%     
================================================
  Files               312      312              
  Lines             43044    43081      +37     
================================================
+ Hits              21655    21680      +25     
- Misses            18914    18920       +6     
- Partials           2475     2481       +6     

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