refactor: enable ClosureReturnTypeRector #12278

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.3) / Sanity Tests	2m 16s
Others (8.2) / Sanity Tests	3m 39s
Others (8.1) / Sanity Tests	2m 37s
CacheLive (8.1) / Cache Live Tests	2m 7s
CacheLive (8.2) / Cache Live Tests	2m 5s
CacheLive (8.3) / Cache Live Tests	1m 58s
DatabaseLive (8.1, MySQLi, 5.7) / tests	2m 59s
DatabaseLive (8.1, MySQLi, 8.0) / tests	3m 23s
SeparateProcess (8.1) / tests	3m 11s
SeparateProcess (8.2) / tests	3m 19s
SeparateProcess (8.3) / tests	3m 15s
DatabaseLive (8.1, OCI8, 8.0) / tests	5m 49s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 34s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 17s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 12s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 32s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 40s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 27s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 1s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	4m 23s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 40s
DatabaseLive (8.3, OCI8, 8.0) / tests	5m 53s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 34s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 26s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	3m 41s
Upload coverage results to Coveralls / coveralls	46s
	1h 27m 45s

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