Perf: SourceField, PathGlobs and Filespec in rust

[tobni]

hyperfine --warmup 1 -n 'main' 'PYENV_VERSION=pants@3.14.3 PANTS_SOURCE=/tmp/pants-main pants --no-pantsd dependencies ::' -n 'add/source-field-in-rust' 'PYENV_VERSION=pants@3.14.3 PANTS_SOURCE=<redacted>/pants pants --no-pantsd dependencies ::'
Benchmark 1: main
  Time (mean ± σ):     32.467 s ±  0.416 s    [User: 37.098 s, System: 11.984 s]
  Range (min … max):   31.933 s … 33.181 s    10 runs
 
Benchmark 2: add/source-field-in-rust
  Time (mean ± σ):     30.605 s ±  0.456 s    [User: 35.140 s, System: 11.875 s]
  Range (min … max):   30.097 s … 31.519 s    10 runs
 
Summary
  add/source-field-in-rust ran
    1.06 ± 0.02 times faster than main

[tobni]

Passed tuples to something expecting strings. Pyo3 validation of types catches it.

[tobni]

memoizing these may be design overkill, but userland could suffer if their plugin reads globs in python and we copy to python heap every access.

[benjyw]

Looks good to me overall! Could use more testing, esp of the functions claiming to emulate Python functionality. It would be good to have tests that run that function via the ffi and run the Python equivalent and compare outputs, across a large number of inputs.

[tobni]

@benjyw I rebased ontop of main since I had conflicts.
Only change is in 4bd44cd which I think addresses your comments