MatrixRTC: Fix different devices from the same user overwriting the room info state event.

[toger5]

This PR is best reviewed with the background from: #3998
The main change in this PR is the transition from using a UserId as the index for call member events in the room info to using the newly introduced CallMemberStateKey that is a combination of UserId and device id.

This is important since otherwise the room state could only store one event per user (but a user can join with multiple devices)

It also adds tests for session membership events (which is the new state event format for call member state events we need for reliable state events)

• Public API changes documented in changelogs (optional)

Signed-off-by:

[toger5]

The commit history does not conform to guidelines. I suspect a rebase will be required anyways which contains the switch to the ruma/ruma.

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 1 line in your changes missing coverage. Please review.

Project coverage is 84.27%. Comparing base (f576c72) to head (77b416c).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/matrix-sdk-base/src/rooms/mod.rs	83.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3972   +/-   ##
=======================================
  Coverage   84.27%   84.27%           
=======================================
  Files         266      266           
  Lines       28336    28337    +1     
=======================================
+ Hits        23880    23881    +1     
  Misses       4456     4456           

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[toger5]

Tarpaulin is failing. test_stale_local_echo_time_abort_edit (fails)

Is this sth that I can fix?

[bnjbvr]

Tarpaulin is failing. test_stale_local_echo_time_abort_edit (fails)

Is this sth that I can fix?

No, intermittent failure. Do you have the permissions to restart it by yourself in the CI interface? (I'll restart it now for you)

[Hywan]

It looks good, thanks for these changes!

Tiny feedback.

[toger5]

LegacyMembershipDataInit should then definitly also require a DeviceId. This cannot be done in this PR but I will add the change to another PR.
(#3972 (comment))

The ruma PR that changes this got merged, so I updated this PR to use the updated LegacyMembershipDataInit.

[Hywan]

Looks good to me, thanks for the PR on Ruma!