refactor: use `array-key` as the benevolent union of `int|string` in … #15789

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.3) / Sanity Tests	1m 24s
Others (8.2) / Sanity Tests	3m 4s
Others (8.4) / Sanity Tests	2m 34s
Others (8.5) / Sanity Tests	1m 34s
SeparateProcess (8.5) / tests	3m 12s
SeparateProcess (8.4) / tests	2m 25s
SeparateProcess (8.2) / tests	3m 12s
SeparateProcess (8.3) / tests	2m 9s
CacheLive (8.3) / Cache Live Tests	1m 9s
CacheLive (8.2) / Cache Live Tests	1m 31s
CacheLive (8.4) / Cache Live Tests	1m 7s
CacheLive (8.5) / Cache Live Tests	1m 13s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 45s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 22s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 11s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 9s
DatabaseLive (8.2, OCI8, 8.0) / tests	8m 46s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 2s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 32s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 44s
DatabaseLive (8.4, OCI8, 8.0) / tests	11m 35s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 17s
DatabaseLive (8.3, Postgre, 8.0) / tests	1m 50s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 33s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 46s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 21s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 13s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 22s
DatabaseLive (8.5, Postgre, 8.0) / tests	1m 48s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 24s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 35s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 0s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	9m 35s
Upload coverage results to Coveralls / coveralls	40s
	2h 4m 8s

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