refactor: migrate `key:generate` command as modern command #14897

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.5) / Sanity Tests	1m 45s
Others (8.3) / Sanity Tests	1m 41s
Others (8.4) / Sanity Tests	2m 3s
Others (8.2) / Sanity Tests	3m 9s
SeparateProcess (8.5) / tests	2m 3s
SeparateProcess (8.4) / tests	2m 19s
SeparateProcess (8.2) / tests	2m 8s
CacheLive (8.3) / Cache Live Tests	1m 14s
SeparateProcess (8.3) / tests	2m 32s
CacheLive (8.4) / Cache Live Tests	1m 33s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 41s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 12s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 12s
CacheLive (8.2) / Cache Live Tests	1m 27s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 0s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 43s
CacheLive (8.5) / Cache Live Tests	1m 7s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 12s
DatabaseLive (8.5, MySQLi, 8.0) / tests	3m 47s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 15s
DatabaseLive (8.3, MySQLi, 8.0) / tests	3m 36s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 2s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 33s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 12s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 49s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 48s
DatabaseLive (8.5, Postgre, 8.0) / tests	2m 22s
DatabaseLive (8.3, Postgre, 8.0) / tests	1m 59s
DatabaseLive (8.4, Postgre, 8.0) / tests	1m 41s
DatabaseLive (8.2, OCI8, 8.0) / tests	8m 47s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 21s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 8s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 13s
Upload coverage results to Coveralls	0s
	1h 50m 38s

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