Update LLVM to llvm/llvm-project@b07e7b76c5d532a61

Update LLVM to llvm/llvm-project@b07e7b76c5d532a6 (llvm/llvm-project#120002)
Carrying the following reverts

- llvm/llvm-project#116470
- llvm/llvm-project#117424
- llvm/llvm-project#119671
- llvm/llvm-project#119970

First two are carry over from previous-previous integrate. It is being fixed in
iree-org#19451 . The last one is a from the previous integrate.
The last one is a new error being tracked in iree-org#19498

Signed-off-by: Stanley Winata <stanley.winata@amd.com>