[llvm] [llc] Provide `opt` like verifier options (PR #106665)

[via llvm-commits]

paperchalice wrote:

> So verify-machineinstrs still exists as an alias for verify-each?

They are different options.
`verify-machineinstrs` is defined in `TargetPassConfig.cpp`, and controls behavior of [`TargetPassConfig::addMachinePrePasses`](https://llvm.org/docs/doxygen/classllvm_1_1TargetPassConfig.html#ad19c346784e85496fca879ea9b36fb8e).
`verify-each` and `disable-verify` control the behavior of verify instrumentation.

https://github.com/llvm/llvm-project/pull/106665