chore: use gotestsum for test execution

[atzoum]

Description

Running tests with gotestsum simplifies the console's output and makes it easier to identify test failures, since only logs from the failed tests are included.

✓  . (1m43.657s) (coverage: 78.7% of statements)
∅  admin
∅  admin/profiler
∅  app
∅  app/apphandlers
✓  app/cluster (3.591s) (coverage: 71.6% of statements)
✓  app/cluster/state (1.677s) (coverage: 74.3% of statements)
∅  build/wait-for-go
∅  cmd/devtool
∅  cmd/devtool/commands
✓  config (7ms) (coverage: 69.5% of statements)
✓  config/backend-config (16.917s) (coverage: 59.8% of statements)
...

If still, for any reason, the full logs from all tests are required, you may enable debug logging

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

Base: 43.99% // Head: 43.94% // Decreases project coverage by -0.04% ⚠️

Coverage data is based on head (23a3b44) compared to base (71c8a15).
Patch has no changes to coverable lines.

❗ Current head 23a3b44 differs from pull request most recent head c01cf11. Consider uploading reports for the commit c01cf11 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2586      +/-   ##
==========================================
- Coverage   43.99%   43.94%   -0.05%     
==========================================
  Files         187      187              
  Lines       39086    39086              
==========================================
- Hits        17197    17178      -19     
- Misses      20808    20827      +19     
  Partials     1081     1081              

Impacted Files	Coverage Δ
enterprise/suppress-user/suppressUser.go	80.86% <0.00%> (-1.86%)	⬇️
processor/processor.go	71.23% <0.00%> (-0.83%)	⬇️

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[lvrach]

I especially like disabling logs by default, it has become to hard to investigate an issue.

[pChondros]

Nice change! tried to see if other tools like GoConvey have similar functionality but they cause more confusion than gain.