fix: check if defined `WRITEPATH` exists #12610

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.1) / Sanity Tests	2m 19s
Others (8.2) / Sanity Tests	3m 50s
Others (8.3) / Sanity Tests	2m 34s
CacheLive (8.1) / Cache Live Tests	1m 55s
CacheLive (8.2) / Cache Live Tests	2m 36s
CacheLive (8.3) / Cache Live Tests	1m 58s
SeparateProcess (8.1) / tests	3m 32s
SeparateProcess (8.2) / tests	3m 41s
SeparateProcess (8.3) / tests	3m 13s
DatabaseLive (8.1, MySQLi, 5.7) / tests	2m 54s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 0s
DatabaseLive (8.1, OCI8, 8.0) / tests	5m 57s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 24s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 45s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 57s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 3s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 24s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 14s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	4m 57s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 28s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 36s
DatabaseLive (8.3, OCI8, 8.0) / tests	5m 47s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 39s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 25s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	4m 27s
Upload coverage results to Coveralls / coveralls	51s
	1h 32m 27s

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