feat:select existing talk room for conversations on calendar events #6484

Job	Run time
php8.1 on master integration tests	1m 21s
php8.1 on master unit tests	1m 7s
php8.1 on stable30 integration tests	1m 33s
php8.1 on stable30 unit tests	1m 28s
php8.2 on master integration tests	1m 33s
php8.2 on master unit tests	1m 9s
php8.2 on stable30 integration tests	1m 16s
php8.2 on stable30 unit tests	1m 12s
php8.3 on master integration tests	53s
php8.3 on master unit tests	1m 36s
php8.3 on stable30 integration tests	1m 17s
php8.3 on stable30 unit tests	1m 35s
php8.4 on master integration tests	1m 44s
php8.4 on master unit tests	3m 23s
php-test-summary	1s
	21m 8s

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