Spaces: Add support for getting a flattened list of editable spaces.

[pixlwave]

This PR makes 2 changes:

• Refactors the tests for Spaces to use a common add_space_rooms function instead of having 3 variants.
• Adds a new method to the SpaceService to get all of the user's joined spaces where they have the power to edit the spaces' children.

[pixlwave]

Note: I'm open to naming suggestions as I wasn't massively confident on what to call this (and the matrix_sdk) function.

[codecov]

Codecov Report

❌ Patch coverage is 99.63235% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 88.66%. Comparing base (ec44c74) to head (61dbc07).
⚠️ Report is 40 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/matrix-sdk-ui/src/spaces/mod.rs	99.63%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5897      +/-   ##
==========================================
+ Coverage   88.65%   88.66%   +0.01%     
==========================================
  Files         362      362              
  Lines      103146   103292     +146     
  Branches   103146   103292     +146     
==========================================
+ Hits        91440    91584     +144     
- Misses       7458     7459       +1     
- Partials     4248     4249       +1     

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[codspeed-hq]

CodSpeed Performance Report

Merging #5897 will not alter performance

_{Comparing doug/all-joined-spaces (61dbc07) with main (100a04a)}

Summary

✅ 50 untouched

[poljar]

Looks mostly good, I think I found a bit of a better name for this function.

Let me know what you think.

[poljar]

One way to make this name a bit more pleasant is to remove the all prefix, and the joined nominator.

I think it's a given that you can only edit joined spaces or rooms for that matter.

So editable_spaces() sounds more palatable to me.

[pixlwave]

I think it's a given that you can only edit joined spaces or rooms for that matter.

Oh yeah good point, totally missed that fact 😆

[pixlwave]

Updated