[draft] Split each tape into a different jaxpr during trace_quantum_function

[paul0403]

Before submitting

TODO: changelog, tests, writeup of implementation

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• [ ] All new functions and code must be clearly commented and documented.

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Context: Split each tape into a different jaxpr during trace_quantum_function Returns an overall big jaxpr that calls these small "each_tape" jaxprs.

This is a preliminary design. There's still some problems, the most significant one being the tape order does not necessarily agree with the pre-transform qnode's return value order.

Also many pytests simply crash under the current design.

An alternative is to apply the transform before the tracing begins, circumventing the need to manually build jaxprs.

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues: closes #442 [sc-67125]