Raise RuntimeWarning if jax > 0.4.28 is installed

[mudit2812]

Jax is not compatible with pennylane for versions > 0.4.28 (confirmed by the test logs of this PR). This PR raises a RuntimeWarning if version > 0.4.28 is installed:

• In QNode.__init__ if the specified interface resolves to JAX or JAX_JIT
• In execute if the original interface was "auto" or None and the resolved interface is JAX or JAX_JIT. I don't raise a warning if the original interface was jax/jax-jit because if that is the case, QNode.__init__ should've already raised a warning.
• This is done by adding a _validate_jax_version private kwarg to qml.math.get_canonical_interface_name, which is called by QNode.__init__, and qml.workflow.resolution._resolve_interface (used by qml.execute), so that both those entry points can raise warnings if appropriate.

Possible drawbacks:
None. The only annoying is that our CI uses supported versions of jax, so we can't get coverage for the runtime warning. I've added a # pragma: no cover to work around this, but I'm not particularly happy about it.

[sc-82570]

[github-actions]

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

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.51%. Comparing base (5910ef7) to head (256b673).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6864      +/-   ##
==========================================
- Coverage   99.59%   99.51%   -0.09%     
==========================================
  Files         478      479       +1     
  Lines       45294    45443     +149     
==========================================
+ Hits        45112    45222     +110     
- Misses        182      221      +39     

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[albi3ro]

So why are we not validating if someone specifies interface="jax"? Or am I missing something?