feat: make random seed configurable in fuzz-testing

[wForget]

Which issue does this PR close?

Closes #1400.

Rationale for this change

make fuzz-testing output not fixed

What changes are included in this PR?

make random seek configurable

How are these changes tested?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.06%. Comparing base (f09f8af) to head (39fbbb3).
Report is 29 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##               main    #1401       +/-   ##
=============================================
- Coverage     56.12%   39.06%   -17.07%     
- Complexity      976     2077     +1101     
=============================================
  Files           119      263      +144     
  Lines         11743    60802    +49059     
  Branches       2251    12930    +10679     
=============================================
+ Hits           6591    23751    +17160     
- Misses         4012    32554    +28542     
- Partials       1140     4497     +3357     

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[andygrove]

Thanks @wForget