[iOS] Improve demangling performance

[NicoHinderling]

1. increased chunk size by 10x (Result: (80.5s → 61.4s) )
2. added ability to process chunks in parallel (Result: (61s → ~8-15s) )

[NicoHinderling]

• [iOS] Improve demangling performance #483 👈 (View in Graphite)
• [iOS] Improve lief parsing performance with configs #490
• [iOS] Refactor get_all_binary_paths + add lief cache #482
• main

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[codecov]

Codecov Report

❌ Patch coverage is 81.11111% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.26%. Comparing base (4f57bae) to head (7c3a773).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/launchpad/utils/apple/cwl_demangle.py	76.19%	10 Missing and 5 partials ⚠️
tests/integration/test_cwl_demangle.py	92.59%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #483   +/-   ##
=======================================
  Coverage   81.26%   81.26%           
=======================================
  Files         164      164           
  Lines       14227    14265   +38     
  Branches     1505     1510    +5     
=======================================
+ Hits        11562    11593   +31     
- Misses       2089     2094    +5     
- Partials      576      578    +2     

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[trevor-e]

nit: private functions at the bottom

[trevor-e]

nit: can we remove big AI comments like this

[trevor-e]

nit: I think this could do something like with mock.patch.dict(os.environ, {"LAUNCHPAD_NO_PARALLEL_DEMANGLE": "value"}): which is a bit easier to manage