[llvm-branch-commits] [BOLT][NFCI] Simplify DataAggregator using traces (PR #143289)

[Amir Ayupov via llvm-branch-commits]

https://github.com/aaupov created https://github.com/llvm/llvm-project/pull/143289

Consistently apply traces as defined in #127125 for branch profile
aggregation. This combines branches and fall-through records into one.

Test Plan: NFC