SNOW-1524245 Gcm encryption using BouncyCastle

[sfc-gh-knozderko]

Description

SNOW-1524245 Gcm encryption using BouncyCastle

Checklist

• [x] Code compiles correctly
• [x] Code is formatted according to Coding Conventions
• [x] Created tests which fail without the change (if possible)
• [x] All tests passing (dotnet test)
• [x] Extended the README / documentation, if necessary
• [x] Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.76271% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.15%. Comparing base (f995ba6) to head (e6bf433). Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ke.Data/Core/FileTransfer/GcmEncryptionProvider.cs	95.53%	4 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1043 +/- ## ========================================== + Coverage 85.99% 86.15% +0.15% ========================================== Files 118 120 +2 Lines 11512 11627 +115 Branches 1157 1165 +8 ========================================== + Hits 9900 10017 +117 + Misses 1332 1329 -3 - Partials 280 281 +1 ```

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