refactor: use uppercase HTTP method names in `FeatureTestTrait` #14412

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.4) / Sanity Tests	3m 23s
Others (8.5) / Sanity Tests	3m 6s
Others (8.3) / Sanity Tests	2m 51s
Others (8.2) / Sanity Tests	5m 4s
SeparateProcess (8.4) / tests	3m 35s
CacheLive (8.2) / Cache Live Tests	2m 30s
CacheLive (8.5) / Cache Live Tests	2m 16s
CacheLive (8.3) / Cache Live Tests	2m 23s
SeparateProcess (8.5) / tests	4m 6s
CacheLive (8.4) / Cache Live Tests	2m 16s
SeparateProcess (8.3) / tests	3m 53s
DatabaseLive (8.2, OCI8, 8.0) / tests	8m 6s
DatabaseLive (8.2, MySQLi, 8.0) / tests	6m 9s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 12s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 36s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 44s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 4s
SeparateProcess (8.2) / tests	3m 59s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 25s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 46s
DatabaseLive (8.2, MySQLi, 5.7) / tests	4m 28s
DatabaseLive (8.3, SQLite3, 8.0) / tests	3m 1s
DatabaseLive (8.5, Postgre, 8.0) / tests	2m 55s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 50s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 24s
DatabaseLive (8.5, SQLite3, 8.0) / tests	2m 49s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 54s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 39s
DatabaseLive (8.4, Postgre, 8.0) / tests	3m 32s
DatabaseLive (8.5, MySQLi, 8.0) / tests	5m 57s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 24s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 53s
DatabaseLive (8.5, OCI8, 8.0) / tests	6m 49s
Upload coverage results to Coveralls / coveralls	47s
	2h 22m 49s

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