Bug#1130159: godot: Consider enabling openxr support

[Travis Wrightsman]

Hi all,

I did some rather blunt packaging updates in a fork [0] to get
openxr-sdk-source to 1.1.61.

I built Godot 4.6.3 with OpenXR 1.1.61 and OpenXR enabled and it builds
totally fine.

Rylie, maybe my changes are useful for you to jumpstart the package
update, but I don't think all of my changes are good (see
d/not-installed).

Cheers,
Travis

[0] https://salsa.debian.org/twrightsman/openxr-sdk-source