refactor: compare `$db->connID` to `false` #14098

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.4) / Sanity Tests	2m 43s
Others (8.3) / Sanity Tests	2m 23s
Others (8.2) / Sanity Tests	4m 1s
Others (8.5) / Sanity Tests	2m 33s
SeparateProcess (8.5) / tests	3m 34s
SeparateProcess (8.2) / tests	3m 55s
SeparateProcess (8.4) / tests	3m 15s
CacheLive (8.4) / Cache Live Tests	2m 4s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 33s
CacheLive (8.5) / Cache Live Tests	2m 7s
SeparateProcess (8.3) / tests	3m 24s
CacheLive (8.2) / Cache Live Tests	2m 26s
CacheLive (8.3) / Cache Live Tests	2m 11s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 28s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 26s
DatabaseLive (8.5, Postgre, 8.0) / tests	2m 33s
DatabaseLive (8.2, MySQLi, 5.7) / tests	4m 28s
DatabaseLive (8.5, OCI8, 8.0) / tests	6m 43s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 52s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 32s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 53s
DatabaseLive (8.5, SQLite3, 8.0) / tests	2m 14s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 54s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 28s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 44s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 46s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 26s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 36s
DatabaseLive (8.3, MySQLi, 8.0) / tests	5m 15s
DatabaseLive (8.5, MySQLi, 8.0) / tests	3m 45s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 11s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 2s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 25s
Upload coverage results to Coveralls / coveralls	52s
	2h 10m 45s

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