Fix ubuntu-latest CI and introduce Arm validation

[foxtran]

Broken tests with CMake + Debug, so these build are currently disabled:
on x86_64:

The following tests FAILED:
	 57 - tblite/gfn1-xtb (NUMERICAL)
	 88 - xtb/docking (NUMERICAL)
	 90 - xtb/gfn0 (NUMERICAL)
	 91 - xtb/gfn1 (NUMERICAL)
	 94 - xtb/hessian (Failed)
	 95 - xtb/iff (NUMERICAL)
	101 - xtb/peeq (Failed)
	106 - xtb/vertical (Failed)
	116 - xtb/GFN0-xTB (NUMERICAL)

on Aarch64:

The following tests FAILED:
	 88 - xtb/docking (Failed)
	 93 - xtb/gfnff (Failed)
	 94 - xtb/hessian (Failed)
	106 - xtb/vertical (Failed)
	107 - xtb/wsc (Failed)

[TyBalduf]

Checks all seem to be passing now, so this looks good to go.

[Albkat]

Is there any particular reason to introduce ARM checks?

[foxtran]

Is there any particular reason to introduce ARM checks?

Some guys uses xtb in AWS cloud. Would be nice to check that at least tests are correct for them. :-)

And you can see that different sets are failing on x86 and Aarch64 in Debug mode.

[Albkat]

I will revert this once the runners with 24.04.5 are fully rolled out (as they have pre-installed LAPACK). Additionally, I will reduce the number of tests—IMO, gfortran 10 and 12 are outdated.