refactor: cleanup code in `Email` #13276

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.2) / Sanity Tests	3m 41s
Others (8.3) / Sanity Tests	2m 39s
Others (8.4) / Sanity Tests	2m 19s
Others (8.1) / Sanity Tests	2m 31s
SeparateProcess (8.1) / tests	3m 52s
SeparateProcess (8.4) / tests	3m 25s
SeparateProcess (8.3) / tests	3m 14s
SeparateProcess (8.2) / tests	3m 36s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 42s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	4m 31s
DatabaseLive (8.1, OCI8, 8.0) / tests	5m 42s
DatabaseLive (8.1, MySQLi, 8.0) / tests	5m 40s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 41s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 41s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	5m 23s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 44s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 44s
DatabaseLive (8.2, OCI8, 8.0) / tests	6m 52s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 33s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 17s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 29s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 27s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 54s
DatabaseLive (8.4, SQLite3, 8.0) / tests	3m 2s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 7s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 22s
CacheLive (8.3) / Cache Live Tests	2m 1s
CacheLive (8.1) / Cache Live Tests	2m 1s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 31s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 15s
CacheLive (8.2) / Cache Live Tests	2m 7s
CacheLive (8.4) / Cache Live Tests	2m 2s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 4s
Upload coverage results to Coveralls / coveralls	45s
	2h 7m 58s

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