Implement the stream class operator

[s-vitaliy]

Part of #144

Scope

Implemented:

• Stream class operator

Additional changes:

• Updated CRDs version
• Enabled code coverage collection

Checklist

• GitHub issue exists for this change.
• Unit tests added and they pass.
• Line Coverage is at least 80%.
• Review requested on latest commit.

[github-actions]

go-test-coverage report:

  below threshold:					coverage:	threshold:
  configuration/configuration.go			 0.0% (0/18)	70%
  services/controllers/stream_class/controller.go	 0.0% (0/5)	70%
  services/controllers/stream_class/handler.go		 0.0% (0/13)	70%
  services/controllers/stream_class/worker.go		 0.0% (0/50)	70%
  telemetry/app_metrics.go				 0.0% (0/9)	70%

Package coverage threshold (70%) satisfied:	FAIL
  below threshold:				coverage:	threshold:
  telemetry					 0.0% (0/9)	70%
  configuration					 0.0% (0/18)	70%
  services/controllers/stream_class		 0.0% (0/68)	70%

Total coverage threshold (75%) satisfied:	FAIL
Total test coverage:  0.0% (0/95)

Files with uncovered lines:
  file:							coverage:	uncovered lines:
  configuration/configuration.go			0%		17-20 22-24 27-36 39-41 43-47 52-55 60
  services/controllers/stream_class/controller.go	0%		24-38 40
  services/controllers/stream_class/handler.go		0%		29-45 47-55 58-66 69-77
  services/controllers/stream_class/worker.go		0%		26-42 44-51 53-61 64 67-75 78-88 91-97 101-108 110-116 119
  telemetry/app_metrics.go				0%		18-22 24 53-56 60-63 65