refactor: fix `@readonly` property errors #13151

Job	Run time
Setup PHP Version for Code Coverage	2s
Others (8.1) / Sanity Tests	2m 28s
Others (8.4) / Sanity Tests	2m 19s
Others (8.3) / Sanity Tests	2m 34s
Others (8.2) / Sanity Tests	3m 41s
SeparateProcess (8.1) / tests	3m 15s
SeparateProcess (8.3) / tests	3m 19s
SeparateProcess (8.2) / tests	3m 11s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 36s
SeparateProcess (8.4) / tests	3m 26s
DatabaseLive (8.1, MySQLi, 8.0) / tests	5m 6s
DatabaseLive (8.1, SQLite3, 8.0) / tests	3m 5s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 32s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 30s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 9s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 42s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 10s
DatabaseLive (8.4, OCI8, 8.0) / tests	5m 53s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 37s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 15s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 10s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 19s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 9s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 8s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 39s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	5m 17s
CacheLive (8.1) / Cache Live Tests	2m 1s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 38s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 25s
DatabaseLive (8.3, MySQLi, 8.0) / tests	5m 39s
CacheLive (8.4) / Cache Live Tests	2m 16s
CacheLive (8.2) / Cache Live Tests	2m 49s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 45s
CacheLive (8.3) / Cache Live Tests	2m 4s
Upload coverage results to Coveralls / coveralls	32s
	2h 5m 41s

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