Fix: enabled cupy backend for sinc interp with tol (=sparse matrix)

[mrava87]

This PR fixes a recently introduced bug in _sincinterp when tol is not None for Cupy arrays.

Instead of using directly scipy's csr_matrix this is now wrapped into one of our deps method dispatching the scipy/cupyx method based on the type of the sinc array.

TODO:

• add Cupy backend to test_interpolation (so far only run on Numpy arrays)

[codacy-production]

Not up to standards ⛔

🔴 Issues 1 critical

Alerts:
⚠ 1 issue (≤ 0 issues of at least minor severity)

Results:
1 new issue

Category	Results
ErrorProne	1 critical

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🟢 Metrics 5 complexity · 0 duplication

Metric	Results
Complexity	5
Duplication	0

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