feat(appset): make K8s client configurable #27

Job	Run time
changes	13s
Ensure Go modules synchronicity	40s
Check changes to generated code	5m 57s
Build & cache Go code	3m 3s
Build, test & lint UI code	2m 17s
Lint Go code	4m 28s
Run unit tests with -race for Go packages	7m 55s
Run end-to-end tests (v1.29.1, true)	46m 25s
Run unit tests for Go packages	4m 23s
Run end-to-end tests (v1.28.6, false)	48m 41s
Run end-to-end tests (v1.27.10, false)	46m 17s
Run end-to-end tests (v1.26.13, false)	48m 6s
E2E Tests - Composite result	1s
Process & analyze test artifacts	38s
	3h 39m 4s

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