Fix testcontext map thread safety #4186

Job	Run time
Linters	1m 25s
Golangci Lint (.)	1m 20s
Build image	2m 20s
Golangci Lint (api)	24s
drenv tests (3.10)	1m 25s
Golangci Lint (e2e)	57s
ramenctl tests (3.10)	18s
drenv tests (3.11)	1m 24s
ramenctl tests (3.11)	13s
drenv tests (3.12)	1m 27s
Unit tests	3m 35s
ramenctl tests (3.12)	21s
drenv tests (3.13)	1m 34s
ramenctl tests (3.13)	26s
drenv tests (3.14-dev)	1m 52s
ramenctl tests (3.14-dev)	39s
Check artifacts and operator deployment (1.29.1)	1m 24s
Publish built image	1m 18s
	22m 22s

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