[llvm-branch-commits] [MC][NFC] Reduce Address2ProbesMap size (PR #102904)

[Amir Ayupov via llvm-branch-commits]

https://github.com/aaupov created https://github.com/llvm/llvm-project/pull/102904

Replace the map from addresses to list of probes with a flat vector
containing probe references sorted by their addresses.

Reduces pseudo probe parsing time from 9.56s to 8.59s and peak RSS from
9.66 GiB to 9.08 GiB as part of perf2bolt processing a large binary.

Test Plan:
```
bin/llvm-lit -sv test/tools/llvm-profgen
```