Deprecate setting the shape attribute of dpnp.ndarray and dpnp.tensor.usm_ndarray

[antonwolfy]

Setting the array shape in place via the shape attribute (a.shape = ...) is now deprecated for both dpnp.ndarray and dpnp.tensor.usm_ndarray. Assigning to .shape emits a DeprecationWarning while preserving the existing behavior for now.

This aligns dpnp with NumPy 2.5, which deprecated the same in-place shape assignment.

Users should reshape arrays with dpnp.reshape / dpnp.tensor.reshape (or the reshape method) instead:

# Deprecated
a.shape = (3, 8)

# Preferred
a = dpnp.reshape(a, (3, 8))

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/2967/index.html

[coveralls]

coverage: 78.069%. remained the same — deprecate-shape-setter into master

[github-actions]

Array API standard conformance tests for dpnp=0.21.0dev1=py313h509198e_33 ran successfully.
Passed: 1356
Failed: 4
Skipped: 16