feat: add optional merge directives for registrars #15522

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.2) / Sanity Tests	3m 27s
Others (8.3) / Sanity Tests	1m 48s
Others (8.5) / Sanity Tests	1m 37s
Others (8.4) / Sanity Tests	1m 38s
CacheLive (8.3) / Cache Live Tests	1m 37s
CacheLive (8.2) / Cache Live Tests	1m 50s
CacheLive (8.5) / Cache Live Tests	1m 34s
SeparateProcess (8.4) / tests	2m 28s
SeparateProcess (8.3) / tests	2m 16s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 32s
SeparateProcess (8.2) / tests	2m 11s
SeparateProcess (8.5) / tests	2m 9s
CacheLive (8.4) / Cache Live Tests	1m 28s
DatabaseLive (8.5, Postgre, 8.0) / tests	1m 40s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 6s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 10s
DatabaseLive (8.3, MySQLi, 8.0) / tests	3m 36s
DatabaseLive (8.4, Postgre, 8.0) / tests	1m 40s
DatabaseLive (8.2, OCI8, 8.0) / tests	9m 44s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 16s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 28s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 4s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 46s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 12s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 27s
DatabaseLive (8.2, MySQLi, 5.7) / tests	5m 42s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 52s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 19s
DatabaseLive (8.3, Postgre, 8.0) / tests	1m 47s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 40s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 58s
DatabaseLive (8.2, SQLite3, 8.0) / tests	1m 51s
DatabaseLive (8.2, Postgre, 8.0) / tests	2m 53s
Upload coverage results to Coveralls / coveralls	53s
	1h 56m 43s

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