Add "Mark as read" action to chat notifications #7323

Job	Run time
changes	10s
Federation master (oci) -> stable34 (mysql)	14m 22s
Federation master (pgsql) -> stable34 (mysql)	20m 39s
Federation stable34 (oci) -> master (mysql)	17m 0s
integration-federation-summary	6s
	52m 17s

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