SNOW-1473274 Sign assembly only when releasing

[sfc-gh-knozderko]

Description

SNOW-1473274 Sign assembly only when releasing

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

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.81%. Comparing base (0e7a4ad) to head (6363a99). Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #974 +/- ## ========================================== + Coverage 84.43% 84.81% +0.38% ========================================== Files 89 89 Lines 9707 9709 +2 Branches 921 921 ========================================== + Hits 8196 8235 +39 + Misses 1283 1245 -38 - Partials 228 229 +1 ```

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