Added jax support to private function `_qsp_to_qsvt()` which handles convention changes.

[Jaybsoni]

Context: Allow for qml.qsvt() to accept phase angles as jax arrays and perform convention conversions.

[github-actions[bot]]

Hello. You may have forgotten to update the changelog! Please edit doc/releases/changelog-dev.md with:

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.66%. Comparing base (96a3d56) to head (f4caa0a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5853 +/- ## ========================================== - Coverage 99.67% 99.66% -0.01% ========================================== Files 425 425 Lines 40751 40457 -294 ========================================== - Hits 40618 40323 -295 - Misses 133 134 +1 ```

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