Toger5/multi lk room same server experiment

[toger5]

Important

Features and UI changes require a pre-approved issue.
Every PR must have a linked issue
that a maintainer has reviewed and approved before you started writing code.
PRs that don't meet this requirement will not be reviewed.
See CONTRIBUTING.md for ElementCall decided for this approach.

Content

Motivation and context

Screenshots / GIFs

Tests

• Step 1
• Step 2
• Step ...

Checklist

• A linked, pre-approved issue exists for this feature or UI change.
• I have read CONTRIBUTING.md in full.
• Pull request includes screenshots or videos for any UI changes.
• Tests written for new code (and existing touched code where feasible).
• Linter and other CI checks pass.
• I have licensed the changes to Element by completing the Contributor License Agreement (CLA)