fix: don't allow omnichannel agents to join closed rooms

[MartinSchoeler]

Proposed changes (including videos or screenshots)

Fixes issue of agents trying to preview a closed livechat room without preview-c-room permission d

Issue(s)

SUP-748

Steps to test or reproduce

1. add user as an agent
2. start livechat conversation
3. close conversation
4. go to contact center
5. click on the closed chat
6. click on open room on the sidebar
7. click on join channel

the join channel screen should not appear for livechat rooms, as these cannot be joined once closed and they have their own permissions for visibility

Further comments

[dionisio-bot]

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[changeset-bot]

🦋 Changeset detected

Latest commit: bbfd197

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 35 packages

Name	Type
@rocket.chat/meteor	Patch
@rocket.chat/core-typings	Patch
@rocket.chat/rest-typings	Patch
@rocket.chat/uikit-playground	Patch
@rocket.chat/api-client	Patch
@rocket.chat/apps	Patch
@rocket.chat/core-services	Patch
@rocket.chat/cron	Patch
@rocket.chat/ddp-client	Patch
@rocket.chat/freeswitch	Patch
@rocket.chat/fuselage-ui-kit	Patch
@rocket.chat/gazzodown	Patch
@rocket.chat/livechat	Patch
@rocket.chat/model-typings	Patch
@rocket.chat/ui-contexts	Patch
@rocket.chat/account-service	Patch
@rocket.chat/authorization-service	Patch
@rocket.chat/ddp-streamer	Patch
@rocket.chat/omnichannel-transcript	Patch
@rocket.chat/presence-service	Patch
@rocket.chat/queue-worker	Patch
@rocket.chat/stream-hub-service	Patch
@rocket.chat/license	Patch
@rocket.chat/omnichannel-services	Patch
@rocket.chat/pdf-worker	Patch
@rocket.chat/presence	Patch
rocketchat-services	Patch
@rocket.chat/models	Patch
@rocket.chat/network-broker	Patch
@rocket.chat/ui-avatar	Patch
@rocket.chat/ui-client	Patch
@rocket.chat/ui-video-conf	Patch
@rocket.chat/ui-voip	Patch
@rocket.chat/web-ui-registration	Patch
@rocket.chat/instance-status	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.46%. Comparing base (279dc55) to head (bbfd197).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #35414   +/-   ##
========================================
  Coverage    59.46%   59.46%           
========================================
  Files         2830     2830           
  Lines        68582    68582           
  Branches     15178    15178           
========================================
  Hits         40781    40781           
  Misses       25132    25132           
  Partials      2669     2669           

Flag	Coverage Δ
unit	75.50% <ø> (ø)

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