wayland-backend: Add getter for global name

[PolyMeilex]

This will be needed for events such as this one: https://wayland.app/protocols/ext-transient-seat-v1#ext_transient_seat_v1:event:ready

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes missing coverage. Please review.

Project coverage is 78.62%. Comparing base (1f6f4f5) to head (84bfcc0).
Report is 31 commits behind head on master.

Files	Patch %	Lines
wayland-backend/src/rs/server_impl/handle.rs	0.00%	15 Missing ⚠️
wayland-backend/src/server_api.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #735      +/-   ##
==========================================
+ Coverage   73.11%   78.62%   +5.51%     
==========================================
  Files          45       41       -4     
  Lines        8183     6537    -1646     
==========================================
- Hits         5983     5140     -843     
+ Misses       2200     1397     -803     

Flag	Coverage Δ
main	?
test--	80.84% <0.00%> (?)
test-client_system-	72.03% <0.00%> (?)
test-client_system-server_system	?

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[elinorbgr]

Given the CI failures, I think this bumps the minimum supported libwayland version. That is not a problem, but the CI scripts should be updated as such, and it should be documented in the changelogs.

[elinorbgr]

Ok, actually the CI no longer fixes the libwayland version, so there's nothing to update here.

But it looks like this change requires a newer version of libwayland-server than is available on the CI environment...

[PolyMeilex]

@elinorbgr I bumped Ubuntu version to 24.04, and we are green now