Raise error on applying transform to qjit

[albi3ro]

Context:

Applying a transform to a qjit object treat treats the qjit object as an arbitrary callable quantum function, and returns a returns a new "quantum function". But a qjit object cannot be treated as a quantum function, and that is not what users would expect to see outputted.

Description of the Change:

Adds an explicit error if a transform is applied to a qjit object.

Benefits:

Less confusion

Possible Drawbacks:

Related GitHub Issues:

[sc-65406]

[isaacdevlugt]

Works for me!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.66%. Comparing base (2100476) to head (fe04178).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5826      +/-   ##
==========================================
- Coverage   99.66%   99.66%   -0.01%     
==========================================
  Files         415      415              
  Lines       39786    39506     -280     
==========================================
- Hits        39654    39373     -281     
- Misses        132      133       +1     

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