feat: introduce `transformRelated()` for smart and isolated relationship transformations #15310

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.2) / Sanity Tests	3m 14s
Others (8.3) / Sanity Tests	1m 54s
Others (8.4) / Sanity Tests	1m 45s
Others (8.5) / Sanity Tests	1m 49s
SeparateProcess (8.4) / tests	2m 7s
CacheLive (8.2) / Cache Live Tests	1m 39s
SeparateProcess (8.2) / tests	1m 59s
CacheLive (8.5) / Cache Live Tests	1m 28s
SeparateProcess (8.3) / tests	2m 19s
CacheLive (8.3) / Cache Live Tests	1m 30s
DatabaseLive (8.3, MySQLi, 8.0) / tests	3m 34s
DatabaseLive (8.2, OCI8, 8.0) / tests	8m 43s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 15s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 33s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 40s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 28s
DatabaseLive (8.4, Postgre, 8.0) / tests	1m 37s
DatabaseLive (8.2, Postgre, 8.0) / tests	2m 39s
CacheLive (8.4) / Cache Live Tests	1m 27s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 23s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 14s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 42s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 29s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 48s
DatabaseLive (8.3, Postgre, 8.0) / tests	1m 53s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 8s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 43s
DatabaseLive (8.5, Postgre, 8.0) / tests	1m 57s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 6s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 2s
SeparateProcess (8.5) / tests	2m 22s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 15s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 38s
Upload coverage results to Coveralls / coveralls	43s
	1h 53m 6s

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