feat(llvm): Script to port MIR patterns

[osmanyasar05]

This PR introduces a script that automatically ports rewrites from LLVM GlobalISel TableGen patterns to Veir.

[github-actions]

VeIR Benchmarks

Details

Benchmark suite	Current: 0c75522	Previous: 0a419ad	Ratio
add-fold-worklist/create	2144000 ns (± 50915)	1861000 ns (± 20477)	1.15
add-fold-worklist/rewrite	3942000 ns (± 53599)	3548000 ns (± 63797)	1.11
add-fold-worklist-local/create	2291000 ns (± 58278)	1843000 ns (± 89949)	1.24
add-fold-worklist-local/rewrite	3337000 ns (± 34946)	2961000 ns (± 45175)	1.13
add-zero-worklist/create	2287000 ns (± 112530)	1841000 ns (± 89735)	1.24
add-zero-worklist/rewrite	2525000 ns (± 45068)	2267000 ns (± 54123)	1.11
add-zero-reuse-worklist/create	1941000 ns (± 45960)	1541000 ns (± 54738)	1.26
add-zero-reuse-worklist/rewrite	2133000 ns (± 79386)	1837000 ns (± 21984)	1.16
mul-two-worklist/create	2275000 ns (± 83413)	1855500 ns (± 94365)	1.23
mul-two-worklist/rewrite	5580000 ns (± 45002)	4959500 ns (± 109268)	1.13
add-fold-forwards/create	2332000 ns (± 108489)	1835000 ns (± 16802)	1.27
add-fold-forwards/rewrite	3038000 ns (± 43108)	2689000 ns (± 45409)	1.13
add-zero-forwards/create	2226000 ns (± 85078)	1838000 ns (± 37930)	1.21
add-zero-forwards/rewrite	1980000 ns (± 35323)	1754000 ns (± 29132)	1.13
add-zero-reuse-forwards/create	1869500 ns (± 89390)	1516000 ns (± 62208)	1.23
add-zero-reuse-forwards/rewrite	1547500 ns (± 48643)	1385000 ns (± 51251)	1.12
mul-two-forwards/create	2173000 ns (± 73874)	1837000 ns (± 92575)	1.18
mul-two-forwards/rewrite	3704000 ns (± 99636)	3218000 ns (± 80363)	1.15
add-zero-reuse-first/create	1884500 ns (± 71889)	1508500 ns (± 50912)	1.25
add-zero-reuse-first/rewrite	8000 ns (± 2152)	9000 ns (± 1907)	0.89
add-zero-lots-of-reuse-first/create	1920500 ns (± 93654)	1506000 ns (± 20603)	1.28
add-zero-lots-of-reuse-first/rewrite	818000 ns (± 32803)	746000 ns (± 13957)	1.10

This comment was automatically generated by workflow using github-action-benchmark.

[osmanyasar05]

Per @ineol's feedback I deleted the script from this PR. I think we'll put it back when (if) we have a folder for the project. LMK if I understood it wrongly so I can revert or make other changes.