refactor: migrate `key:generate` command as modern command #14903

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.4) / Sanity Tests	1m 47s
Others (8.5) / Sanity Tests	4m 2s
Others (8.3) / Sanity Tests	1m 44s
Others (8.2) / Sanity Tests	3m 10s
CacheLive (8.5) / Cache Live Tests	1m 4s
CacheLive (8.3) / Cache Live Tests	1m 12s
CacheLive (8.4) / Cache Live Tests	1m 6s
CacheLive (8.2) / Cache Live Tests	1m 30s
SeparateProcess (8.4) / tests	2m 11s
SeparateProcess (8.3) / tests	2m 2s
SeparateProcess (8.5) / tests	2m 11s
SeparateProcess (8.2) / tests	2m 16s
DatabaseLive (8.2, Postgre, 8.0) / tests	2m 36s
DatabaseLive (8.4, SQLite3, 8.0) / tests	1m 2s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 10s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 6s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 26s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 4s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 46s
DatabaseLive (8.5, SQLite3, 8.0) / tests	1m 11s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 14s
DatabaseLive (8.3, SQLite3, 8.0) / tests	1m 12s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 6s
DatabaseLive (8.2, OCI8, 8.0) / tests	9m 47s
DatabaseLive (8.3, OCI8, 8.0) / tests	7m 32s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 27s
DatabaseLive (8.3, MySQLi, 8.0) / tests	3m 29s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 50s
DatabaseLive (8.2, SQLite3, 8.0) / tests	2m 15s
DatabaseLive (8.5, OCI8, 8.0) / tests	7m 1s
DatabaseLive (8.5, MySQLi, 8.0) / tests	3m 38s
DatabaseLive (8.4, Postgre, 8.0) / tests	1m 45s
DatabaseLive (8.5, Postgre, 8.0) / tests	1m 47s
Upload coverage results to Coveralls / coveralls	45s
	1h 51m 27s

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