SNOW-1524257 Implement GCM encryption

[sfc-gh-pfus]

Description

SNOW-1524257 Implemented GCM encryption to be ready for CSP integrations.

Checklist

• Created tests which fail without the change (if possible)
• Extended the README / documentation, if necessary

[gitguardian]

️✅ There are no secrets present in this pull request anymore.

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[codecov]

Codecov Report

Attention: Patch coverage is 64.96350% with 48 lines in your changes missing coverage. Please review.

Project coverage is 82.57%. Comparing base (1a90e21) to head (5b13f38).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
encrypt_util.go	63.90%	48 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1191      +/-   ##
==========================================
- Coverage   82.79%   82.57%   -0.22%     
==========================================
  Files          55       55              
  Lines       13194    13315     +121     
==========================================
+ Hits        10924    10995      +71     
- Misses       2270     2320      +50     

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