WIP: update passes to use PassScope

[acl-cqc]

Follow-up to #2772, but so far only RemoveDeadFuncsPass and UntuplePass.

Non-breaking, so keeping pre-existing pass configurating methods and storing such config in an Either<PassScope, ....>

[hugrbot]

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[codecov]

Codecov Report

❌ Patch coverage is 81.48148% with 30 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.33%. Comparing base (11a643e) to head (b3f985b).

Files with missing lines	Patch %	Lines
hugr-passes/src/untuple.rs	65.67%	22 Missing and 1 partial ⚠️
hugr-passes/src/dead_funcs.rs	95.40%	4 Missing ⚠️
hugr-passes/src/monomorphize.rs	57.14%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##           ab/pass-scopes    #2836      +/-   ##
==================================================
- Coverage           83.55%   83.33%   -0.23%     
==================================================
  Files                 263      263              
  Lines               53019    52846     -173     
  Branches            47480    47533      +53     
==================================================
- Hits                44302    44041     -261     
- Misses               6328     6426      +98     
+ Partials             2389     2379      -10     

Flag	Coverage Δ
python	88.02% <ø> (+0.81%)	⬆️
rust	82.81% <81.48%> (-0.32%)	⬇️

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