[llvm] Reapply [BOLT] DataAggregator support for binaries with multiple text segments (PR #118023)

[Paschalis Mpeis via llvm-commits]

paschalis-mpeis wrote:

## Reapplying:
- #92815
- Originally merged by commit [4b71b37](https://github.com/llvm/llvm-project/commit/4b71b3782d217db0138b701c4514bd2168ca1659), and then reverted by commit [537343d](https://github.com/llvm/llvm-project/commit/537343dea4e65ddb837473c9349884e856664ad8) as it was causing some [local build](https://github.com/llvm/llvm-project/pull/92815#issuecomment-2500868284) failures.

@zmodem, can you confirm by approving this PR that all is OK now?

---

The only change is [this](https://github.com/llvm/llvm-project/pull/118023/commits/71a6c4522ce499fbb201d151f5140c1ae684c5de). An alternative could be to upgrade [this](https://github.com/llvm/llvm-project/blob/71a6c4522ce499fbb201d151f5140c1ae684c5de/bolt/lib/Profile/DataAggregator.cpp#L2132) assertion (line 2132) to a `report_fatal_error`.

@maksfb, let me know if that is preferred, otherwise I will reapply the patch by EOD tomorrow.

https://github.com/llvm/llvm-project/pull/118023