Use jetstream strict for tests #4415

Job	Run time
check feature flags (ubuntu-latest / stable)	8m 29s
check examples (ubuntu-latest / stable)	42s
check format (ubuntu-latest / nightly)	11s
check docs (ubuntu-latest / stable)	1m 18s
check licenses (ubuntu-latest / stable)	22s
check linter (ubuntu-latest / stable)	1m 24s
check minimal versions of transitive dependencies (ubuntu-latest / stable)	25s
check minimal supported rust version (ubuntu-latest / msrv)	43s
check spelling (ubuntu-latest / nightly)	5m 34s
test (ubuntu-latest / stable)	20m 46s
test (macos-latest / stable)	30m 9s
test (windows-latest / stable)	23m 21s
	1h 33m 24s

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