refactor: use uppercase HTTP method names in `FeatureTestTrait` #14433

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.3) / Sanity Tests	2m 37s
Others (8.5) / Sanity Tests	2m 40s
Others (8.2) / Sanity Tests	4m 9s
Others (8.4) / Sanity Tests	2m 36s
SeparateProcess (8.2) / tests	3m 30s
CacheLive (8.4) / Cache Live Tests	2m 35s
SeparateProcess (8.3) / tests	3m 28s
SeparateProcess (8.4) / tests	3m 17s
CacheLive (8.5) / Cache Live Tests	2m 41s
CacheLive (8.3) / Cache Live Tests	2m 26s
SeparateProcess (8.5) / tests	3m 24s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 48s
CacheLive (8.2) / Cache Live Tests	4m 0s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 18s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 30s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 15s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 36s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 58s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 9s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	6m 4s
DatabaseLive (8.5, Postgre, 8.0) / tests	2m 20s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 57s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 40s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 33s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 50s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 16s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 20s
DatabaseLive (8.3, MySQLi, 8.0) / tests	3m 57s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 20s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 47s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 41s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 29s
DatabaseLive (8.5, SQLite3, 8.0) / tests	2m 20s
Upload coverage results to Coveralls / coveralls	41s
	2h 15m 15s

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