fix: Change workloadidentity token cache expiry based on token expiry (#23100)

[agaudreault]

Cherry pick of #23133

Signed-off-by: Jagpreet Singh Tamber [email protected]
Signed-off-by: Alexandre Gaudreault [email protected]<!--
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Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
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• The title of the PR conforms to the Toolchain Guide
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
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[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.97%. Comparing base (001848e) to head (3ee5c88).
⚠️ Report is 42 commits behind head on release-3.0.

Files with missing lines	Patch %	Lines
util/helm/creds.go	86.36%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           release-3.0   #23264      +/-   ##
===============================================
+ Coverage        55.88%   55.97%   +0.09%     
===============================================
  Files              343      343              
  Lines            57395    57422      +27     
===============================================
+ Hits             32075    32143      +68     
+ Misses           22663    22635      -28     
+ Partials          2657     2644      -13     

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