fix(gcp): use session credentials to check if API is active

[prowler-bot]

Backport

This will backport the following commits from master to v4.6:

• fix(gcp): use session credentials to check if API is active (#5935)

Questions ?

Please refer to the Backport tool documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.91%. Comparing base (412d948) to head (9244b3e).
Report is 1 commits behind head on v4.6.

Additional details and impacted files

@@            Coverage Diff             @@
##             v4.6    #5936      +/-   ##
==========================================
+ Coverage   89.90%   89.91%   +0.01%     
==========================================
  Files        1147     1147              
  Lines       35608    35608              
==========================================
+ Hits        32013    32017       +4     
+ Misses       3595     3591       -4     

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