feat: guppy_opt everywhere

[acl-cqc]

Alternative to #1270

Fixes NormalizeGuppy to run everywhere, not just within the entrypoint (typically the entrypoint is a wrapper main function that contains no interesting quantum gates, just qalloc/discard, but calls a function outside the entrypoint that has the gates).

And, fix guppy_opt.rs to run pytket everywhere. This is hard, and so this should not be test code!

Thoughts?

There's another change to behaviour on angles.rs....

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.06%. Comparing base (133c885) to head (d48a219).

Files with missing lines	Patch %	Lines
tket/src/passes/guppy.rs	78.57%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1305      +/-   ##
==========================================
+ Coverage   79.60%   80.06%   +0.46%     
==========================================
  Files         160      160              
  Lines       20601    20610       +9     
  Branches    19635    19644       +9     
==========================================
+ Hits        16399    16501     +102     
+ Misses       3221     3139      -82     
+ Partials      981      970      -11     

Flag	Coverage Δ
python	92.92% <ø> (ø)
qis-compiler	100.00% <ø> (ø)
rust	79.41% <80.00%> (+0.48%)	⬆️

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