[llvm-exegesis] Analysis should just highlight in red the mismatched uop measurements not the entire sample

[RKSimon]

Currently llvm-exegesis analysis html output highlights all the uop pipes in red when an instruction's measurements don't match the scheduler model, but ideally we should only highlight the specific pipes that mismatch to make it more obvious what is wrong.

[llvmbot]

@llvm/issue-subscribers-tools-llvm-exegesis