Revert "find_psr4_file: Quick exit if psr4_map is not populated (#39646)" #90969

Job	Run time
Determine tests matrix	1m 5s
E2E: Build jetpack-boost	3m 18s
E2E: Build jetpack-core	4m 8s
E2E: Build jetpack-search	3m 57s
E2E: Build jetpack-social	3m 38s
E2E: Build jetpack-videopress	2m 51s
Jetpack connection e2e tests	3m 54s
Jetpack pre-connection e2e tests	2m 30s
Jetpack post-connection e2e tests	4m 37s
Jetpack Boost - Base e2e tests	3m 39s
Jetpack Boost - Modules e2e tests	4m 17s
Jetpack Boost - Critical CSS e2e tests	4m 20s
Jetpack Boost - Page Cache e2e tests	7m 7s
Jetpack Boost - Concatenate JS/CSS e2e tests	3m 7s
Jetpack Boost - Image CDN e2e tests	2m 49s
Jetpack Boost - Image Guide e2e tests	2m 39s
Search e2e tests	5m 1s
VideoPress e2e tests	2m 41s
Social e2e tests	4m 29s
Slack notification	55s
Test report	2s
	1h 11m 4s

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