Properly load multiple action sets in XR

[Faolan-Rad]

This pull request addresses an issue where Godot was unable to correctly load multiple action sets. Previously, only the first action set was loaded, and any subsequent attempts would result in an error, indicating that the action sets were already loaded.

This fix ensures that multiple action sets can be loaded without errors

• Bugsquad edit, fixes: Multiple OpenXR Action Sets in Godot does not work  #80420

[Faolan-Rad]

issues

[Faolan-Rad]

This should be a complete fix for the bug unless I missed something.

[YuriSizov]

Please amend the commit message to be closer to the project's preferred style. The current title of the PR is a good option. We don't prefix commits/PR titles with Fix: or anything like that, and there is no need to capitalize every word.

[BastiaanOlij]

I'm going to double check this with OpenXR because it should be possible to attach action sets one at a time, it shouldn't clear previously attached action sets...

[BastiaanOlij]

No, I'm definately wrong, I don't know if this was a restriction added after I build this or if it is something else but:

The runtime must return XR_ERROR_ACTIONSETS_ALREADY_ATTACHED if [xrAttachSessionActionSets (https://registry.khronos.org/OpenXR/specs/1.0/man/html/xrAttachSessionActionSets.html) is called more than once for a given session.

in https://registry.khronos.org/OpenXR/specs/1.0/man/html/xrAttachSessionActionSets.html

[akien-mga]

Thanks!