Avoid parsing with Salsa

[charliermarsh]

Summary

For reasons I haven't investigated, this speeds up the resolver about 2x (from 6.404s to 3.612s on an extremely large codebase).

Test Plan

\cc @BurntSushi

[andrew@duff rippling]$ time ruff analyze graph --preview > /dev/null

real    3.274
user    16.039
sys     7.609
maxmem  11631 MB
faults  0
[andrew@duff rippling]$ time ruff-patch analyze graph --preview > /dev/null

real    1.841
user    14.625
sys     3.639
maxmem  7173 MB
faults  0
[andrew@duff rippling]$ time ruff-patch2 analyze graph --preview > /dev/null

real    2.087
user    15.333
sys     4.869
maxmem  8642 MB
faults  0

Where that's main, then (ruff-patch) using the version with no File, no SemanticModel, then (ruff-patch2) using File.

[charliermarsh]

@MichaReiser -- Would you prefer that I create a struct that exposes this? (I can't use SemanticModel because that requires a File, and I no longer have a File upfront.)

[github-actions]

ruff-ecosystem results

Linter (stable)

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Linter (preview)

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Formatter (stable)

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Formatter (preview)

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