fix: unset `encryption.key` variables in `RunInSeparateProcess` tests… #13506

Job	Run time
Setup PHP Version for Code Coverage	7s
Others (8.1) / Sanity Tests	2m 32s
Others (8.2) / Sanity Tests	3m 43s
Others (8.4) / Sanity Tests	2m 34s
Others (8.3) / Sanity Tests	2m 41s
SeparateProcess (8.3) / tests	4m 11s
SeparateProcess (8.4) / tests	3m 36s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 11s
SeparateProcess (8.1) / tests	3m 40s
SeparateProcess (8.2) / tests	3m 34s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 38s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 30s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 33s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 26s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 9s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 29s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 57s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 40s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 34s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 29s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 6s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 32s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 8s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 14s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 35s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 46s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 33s
DatabaseLive (8.2, MySQLi, 8.0) / tests	6m 8s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 45s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 37s
CacheLive (8.1) / Cache Live Tests	2m 17s
CacheLive (8.2) / Cache Live Tests	2m 17s
CacheLive (8.3) / Cache Live Tests	2m 19s
CacheLive (8.4) / Cache Live Tests	2m 5s
Upload coverage results to Coveralls / coveralls	42s
	2h 8m 18s

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