chore: use testify instead of testing.Fatal or testing.Error in serve… #159

Job	Run time
changes	4s
Ensure Go modules synchronicity	39s
Build, test & lint UI code	2m 11s
Check changes to generated code	4m 46s
Build & cache Go code	3m 16s
Lint Go code	5m 14s
Run unit tests for Go packages	5m 21s
Run unit tests with -race for Go packages	9m 14s
Run end-to-end tests (v1.31.0, true)	50m 38s
Run end-to-end tests (v1.30.4, false)	54m 41s
Run end-to-end tests (v1.29.8, false)	50m 16s
Run end-to-end tests (v1.28.13, false)	50m 58s
E2E Tests - Composite result	1s
Process & analyze test artifacts	0s
	3h 57m 19s

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