Update dlpack to v1.2

[ndgrigorian]

This PR proposes updating the vendored DLPack header dlpack.h to v1.2 and adds data type code and device type enum definitions where necessary

It does not work towards supporting the new C functions to optimize speed of exchange, which could be done in a follow-up PR

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpctl/pulls/2193/index.html

[coveralls]

coverage: 86.283% (+0.007%) from 86.276%
when pulling 68c2167 on update-dlpack-v1.2
into 70920d3 on master.

[github-actions]

Array API standard conformance tests for dpctl=0.22.0dev0=py310h93fe807_26 ran successfully.
Passed: 1110
Failed: 48
Skipped: 82

[antonwolfy]

It seems we need to update numpy_to_dlpack_versioned_capsule at line following dlpack changes added in v1.2
NumPy did that here.

[ndgrigorian]

good point, I didn't think we would need to make a change for that part, but I'll adjust it