Add Enzyme CI for other backends than CPU and CUDA

[vchuravy]

For the recently added Enzyme support via EnzymeRules we will need to extend CI and support to more backends

• [ ] AMDGPU -- should work
• [ ] oneAPI -- probably no-one has tried
• [ ] Metal -- probably no=one has tried

Improve CI coverage

• [ ] Code that uses @localmem and @private
• [ ] Code that requires runtime caching through malloc

[michel2323]

Shall I add runners at ANL? If so, can you give me the rights to create runner?

[vchuravy]

We do have the runners as part of JuliaGPU, but not the tests xD