Add support for GCS short live token

[rubenvp8510]

Fixes #1141

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.00000% with 17 lines in your changes missing coverage. Please review.

Project coverage is 58.85%. Comparing base (3b270ff) to head (89ec53a).

Files with missing lines	Patch %	Lines
internal/manifests/oauthproxy/oauth_proxy.go	0.00%	4 Missing and 1 partial ⚠️
internal/manifests/monolithic/serviceaccount.go	69.23%	3 Missing and 1 partial ⚠️
internal/manifests/manifestutils/storage.go	89.28%	2 Missing and 1 partial ⚠️
...nternal/manifests/serviceaccount/serviceaccount.go	0.00%	2 Missing and 1 partial ⚠️
internal/manifests/monolithic/statefulset.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1140      +/-   ##
==========================================
+ Coverage   58.57%   58.85%   +0.27%     
==========================================
  Files         113      113              
  Lines       10255    10319      +64     
==========================================
+ Hits         6007     6073      +66     
+ Misses       3939     3934       -5     
- Partials      309      312       +3     

Flag	Coverage Δ
unittests	58.85% <83.00%> (+0.27%)	⬆️

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