Updating compiler support and test cases

[hatemhelal]

torch compile is under active development so the mace compile support needed a few updates to keep up with recent torch releases. This PR:

• adds pytest-benchmark to the development install of mace
• removes usage of an API that doesn't exist in pytorch 2.3 and up
• updates the test cases to use ScaleShiftMACE as I understand this is the most widely used model implementation
• removed the fullgraph=True option which was triggering a compiler assertion for using requires_grad_ on the model input tensors. I think this assertion is ok to ignore since the test case that checks for graph breaks is still passing.
• skipping the mixed-precision benchmark as this fails with an assertion on mismatched datatypes in the scatter operation.

I'd prefer to leave the mixed-precision test case in place in case that can be made to work in some future PyTorch release.

[ilyes319]

Hey @hatemhelal, thank you very much. I had a look and it seems great.