feat: mail snippets #16825

Job	Run time
Front-end unit tests	2m 18s
Nextcloud master php8.1 unit tests	2m 16s
master w/ php8.3-sqlite-nocache integration tests	4m 50s
Nextcloud stable30 php8.1 unit tests	2m 12s
master w/ php8.3-mysql-nocache integration tests	3m 1s
Nextcloud master php8.2 unit tests	3m 54s
master w/ php8.3-pgsql-nocache integration tests	4m 51s
master w/ php8.1-sqlite-redis integration tests	12m 12s
master w/ php8.2-mysql-redis integration tests	14m 52s
Nextcloud stable30 php8.2 unit tests	3m 42s
stable30 w/ php8.2-mysql-redis integration tests	14m 30s
Nextcloud master php8.3 unit tests	3m 31s
Nextcloud stable30 php8.3 unit tests	3m 31s
Nextcloud master php8.4 unit tests	3m 22s
test-summary	6s
	1h 19m 8s

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