refactor: migrate `key:generate` command as modern command (#10164) #14948

Job	Run time
Setup PHP Version for Code Coverage	2s
Others (8.3) / Sanity Tests	1m 50s
Others (8.5) / Sanity Tests	2m 22s
Others (8.2) / Sanity Tests	3m 11s
Others (8.4) / Sanity Tests	2m 2s
CacheLive (8.5) / Cache Live Tests	1m 8s
CacheLive (8.2) / Cache Live Tests	1m 18s
CacheLive (8.3) / Cache Live Tests	1m 3s
SeparateProcess (8.4) / tests	2m 12s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 20s
CacheLive (8.4) / Cache Live Tests	1m 17s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 5s
SeparateProcess (8.2) / tests	2m 16s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 12s
SeparateProcess (8.5) / tests	2m 12s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 14s
SeparateProcess (8.3) / tests	2m 16s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 9s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 23s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 30s
DatabaseLive (8.2, Postgre, 8.0) / tests	2m 47s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 24s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 40s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	6m 4s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 41s
DatabaseLive (8.2, OCI8, 8.0) / tests	8m 42s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 21s
DatabaseLive (8.5, Postgre, 8.0) / tests	1m 49s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 32s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 8s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 6s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 51s
DatabaseLive (8.4, Postgre, 8.0) / tests	1m 44s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 45s
Upload coverage results to Coveralls / coveralls	50s
	1h 53m 26s

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