[ENH] Add CPU-GPU parity test suite for ROCKET

[Adityakushwaha2006]

Reference Issues/PRs

-Fixes #1248

What does this implement/fix? Explain your changes.

This PR adds a test suite to verify CPU-GPU parity in ROCKET implementations when initialized with the same random seed.

Test Coverage (15 total test variants):

• Basic parity tests: 8 parametrized tests covering 1, 2, 3, and 8 channels across 50 and 100 timepoints
• Determinism tests: Verify same seed produces identical results across multiple runs
• Different seeds tests: 3 parametrized tests ensuring randomness works correctly
• Edge cases: Minimal data sizes and long series to check boundary conditions and error accumulation
• API consistency: Verify fit_transform matches fit then transform

All tests verify features match within 1e-4 precision (decimal=4) .

Does your contribution introduce a new dependency? If yes, which one?

None.

Any other comments?

Please note the expected failure of the Cl , until fix is merged into main ( from PR #3227). Will rebase and run to confirm correctness once fix in place.

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[MatthewMiddlehurst]

Turning to draft until related PR has been resolved