LLVM 23 changes sort order of coverage mapping

[durin42]

llvm/llvm-project@5931034 changes how coverage records get sorted a bit, which breaks three tests:

    [coverage-map] tests/coverage/async.rs
    [coverage-map] tests/coverage/coroutine.rs
    [coverage-map] tests/coverage/yield.rs

We caught this on our LLVM@HEAD CI and it doesn't look like there's a way to conditionalize the output here, so I'm just filing this so we keep track of it and have a tracking bug that we can use in our system to disable those tests until this gets fixed (presumably when we update to LLVM 23.)

[workingjubilee]

cc @Zalathar fyi small change re: coverage output