fix: `SUPPORTPATH` may be undefined in some contexts (#9882) #14086

Job	Run time
Setup PHP Version for Code Coverage	2s
Others (8.3) / Sanity Tests	2m 38s
Others (8.2) / Sanity Tests	3m 41s
Others (8.1) / Sanity Tests	2m 25s
Others (8.4) / Sanity Tests	2m 37s
CacheLive (8.4) / Cache Live Tests	2m 2s
CacheLive (8.1) / Cache Live Tests	1m 58s
CacheLive (8.2) / Cache Live Tests	2m 17s
CacheLive (8.3) / Cache Live Tests	2m 10s
SeparateProcess (8.2) / tests	3m 39s
SeparateProcess (8.4) / tests	3m 4s
SeparateProcess (8.3) / tests	3m 33s
SeparateProcess (8.1) / tests	3m 39s
DatabaseLive (8.2, Postgre, 8.0) / tests	2m 56s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 50s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 11s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 12s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 46s
DatabaseLive (8.1, OCI8, 8.0) / tests	7m 19s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 14s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 6s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 8s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 28s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 3s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 58s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 41s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 39s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 22s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 23s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 41s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 11s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 35s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 47s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 12s
Upload coverage results to Coveralls / coveralls	42s
	2h 4m 9s

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