chore: cleanup comments inside cmp tests #28308

Job	Run time
changes	11s
Lint Go code	1m 44s
Ensure Go modules synchronicity	22s
Check changes to generated code	8m 33s
Build & cache Go code	2m 53s
Build, test & lint UI code	0s
Run unit tests for Go packages	4m 11s
Run unit tests with -race for Go packages	7m 57s
Run end-to-end tests (v1.29.1)	45m 13s
Run end-to-end tests (v1.28.6)	44m 23s
Run end-to-end tests (v1.27.10)	44m 41s
Run end-to-end tests (v1.26.13)	45m 0s
Run end-to-end tests (v1.25.16)	45m 14s
Process & analyze test artifacts	0s
E2E Tests - Composite result	1s
	4h 10m 23s

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