Don't do an authenticated /versions request in the RoomListService builder

[poljar]

This closes #5845

This rather avoids the issue instead of fixing it. As the /versions call in the RoomListService is only used to figure out if a certain feature the user has enabled should actually be enabled and this is a release blocker for EX, I deemed that it's fine to avoid tackling the problem that /versions calls can't do token refresh.

• Public API changes documented in changelogs (optional)

[codspeed-hq]

CodSpeed Performance Report

Merging #5853 will not alter performance

_{Comparing poljar/fix-versions-roomlist-service-builder (8347b3a) with main (e79f832)}

Summary

✅ 50 untouched

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.59%. Comparing base (f9584f5) to head (8347b3a).
⚠️ Report is 11 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
crates/matrix-sdk/src/client/mod.rs	45.45%	5 Missing and 1 partial ⚠️
crates/matrix-sdk-ui/src/room_list_service/mod.rs	77.77%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5853      +/-   ##
==========================================
- Coverage   88.60%   88.59%   -0.01%     
==========================================
  Files         361      361              
  Lines      102294   102311      +17     
  Branches   102294   102311      +17     
==========================================
+ Hits        90640    90646       +6     
- Misses       7433     7443      +10     
- Partials     4221     4222       +1     

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