[llvm] [BOLT][NFC] Simplify getOrCreate/analyze/populate/emitJumpTable (PR #132108)

[Amir Ayupov via llvm-commits]

aaupov wrote:

> There's a new change to `bolt/lib/Core/BinaryEmitter.cpp` in the last commit.

Yes, I think it makes sense to have it in this NFC diff as well (used to be in a separate patch).


https://github.com/llvm/llvm-project/pull/132108