fix(appointments): Make scheduled appointments meeting conversations …

[nickvergessen]

…in Talk

• Server PR feat(talk): Allow to create conversations that are meetings server#59407
• Talk PR fix(appointments): Make scheduled appointments meeting conversations spreed#17604

Steps

1. Create an "Appointments schedule" with Talk conversation option
2. Book a meeting and confirm it

Before	After
Conversation is always visible	Conversation is only visible when the meeting is close or list is filtered for meetings
Conversation persists after the call	Conversation expires after 28 days

[miaulalala]

lgtm, not sure about the "public" option but it kinda makese sense

[nickvergessen]

not sure about the "public" option but it kinda makese sense

That was there before, it's needed as the other user is a public link guest