Rollup merge of #145380 - okaneco:add-codegen-tests, r=Mark-Simulacrum

Add codegen-llvm regression tests

Most of these regressions deal with elimination of panics and bounds checks that were fixed upstream by LLVM.

closes rust-lang/rust#141497
closes rust-lang/rust#131162
closes rust-lang/rust#129583
closes rust-lang/rust#110971
closes rust-lang/rust#91109
closes rust-lang/rust#80075
closes rust-lang/rust#74917
closes rust-lang/rust#71997
closes rust-lang/rust#71257
closes rust-lang/rust#59352

Author: jhpratt