refactor: fix phpstan errors in `URI` and `SiteURI` #13145

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.3) / Sanity Tests	2m 48s
Others (8.4) / Sanity Tests	2m 32s
Others (8.2) / Sanity Tests	3m 53s
Others (8.1) / Sanity Tests	2m 35s
SeparateProcess (8.4) / tests	3m 38s
SeparateProcess (8.1) / tests	3m 36s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 6s
SeparateProcess (8.2) / tests	3m 40s
SeparateProcess (8.3) / tests	3m 44s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 33s
DatabaseLive (8.4, MySQLi, 8.0) / tests	5m 6s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 56s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 48s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 54s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 45s
DatabaseLive (8.1, MySQLi, 8.0) / tests	5m 35s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 17s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 27s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 16s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 57s
DatabaseLive (8.1, SQLite3, 8.0) / tests	3m 1s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 54s
DatabaseLive (8.3, Postgre, 8.0) / tests	3m 3s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 44s
CacheLive (8.3) / Cache Live Tests	2m 11s
CacheLive (8.1) / Cache Live Tests	2m 5s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 46s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 35s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 47s
CacheLive (8.4) / Cache Live Tests	2m 11s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 42s
CacheLive (8.2) / Cache Live Tests	2m 13s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 19s
Upload coverage results to Coveralls / coveralls	43s
	2h 12m 23s

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