feat: add email/smtp plain auth method #12977

Job	Run time
Setup PHP Version for Code Coverage	1s
Others (8.3) / Sanity Tests	2m 32s
Others (8.2) / Sanity Tests	3m 50s
Others (8.1) / Sanity Tests	2m 55s
Others (8.4) / Sanity Tests	2m 34s
CacheLive (8.1) / Cache Live Tests	2m 5s
CacheLive (8.3) / Cache Live Tests	2m 2s
CacheLive (8.2) / Cache Live Tests	2m 41s
CacheLive (8.4) / Cache Live Tests	2m 9s
DatabaseLive (8.1, MySQLi, 5.7) / tests	2m 59s
DatabaseLive (8.1, MySQLi, 8.0) / tests	4m 36s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 7s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 36s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 42s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	4m 37s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 43s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 3s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 18s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 14s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	4m 59s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 22s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 13s
DatabaseLive (8.3, Postgre, 8.0) / tests	3m 30s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 57s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	4m 29s
DatabaseLive (8.4, MySQLi, 8.0) / tests	3m 56s
DatabaseLive (8.4, OCI8, 8.0) / tests	7m 6s
DatabaseLive (8.4, Postgre, 8.0) / tests	3m 1s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 47s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 30s
SeparateProcess (8.2) / tests	4m 0s
SeparateProcess (8.1) / tests	3m 21s
SeparateProcess (8.3) / tests	3m 29s
SeparateProcess (8.4) / tests	3m 15s
Upload coverage results to Coveralls / coveralls	56s
	2h 5m 35s

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