refactor: Fix phpstan errors `offsetAccess.notFound` #13030

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.2) / Sanity Tests	4m 17s
Others (8.3) / Sanity Tests	2m 24s
Others (8.4) / Sanity Tests	2m 36s
Others (8.1) / Sanity Tests	2m 36s
CacheLive (8.1) / Cache Live Tests	2m 24s
CacheLive (8.2) / Cache Live Tests	2m 19s
CacheLive (8.3) / Cache Live Tests	2m 3s
CacheLive (8.4) / Cache Live Tests	2m 3s
DatabaseLive (8.1, MySQLi, 5.7) / tests	4m 36s
DatabaseLive (8.1, MySQLi, 8.0) / tests	5m 36s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 38s
SeparateProcess (8.1) / tests	3m 30s
SeparateProcess (8.2) / tests	3m 27s
SeparateProcess (8.3) / tests	3m 34s
SeparateProcess (8.4) / tests	3m 36s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 38s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 24s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	5m 8s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 51s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 26s
DatabaseLive (8.2, Postgre, 8.0) / tests	4m 3s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 40s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 22s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 58s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 12s
DatabaseLive (8.3, Postgre, 8.0) / tests	3m 4s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 40s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 21s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 45s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 5s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 59s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 36s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 41s
Upload coverage results to Coveralls / coveralls	57s
	2h 12m 30s

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