[flang] [llvm] [mlir] mlir/LogicalResult: move into llvm (PR #97309)

[Théo Degioanni via llvm-commits]

https://github.com/Moxinilian commented:

Looks good to me with respects to IRDL, Mem2Reg and SROA, beyond the nit below.

https://github.com/llvm/llvm-project/pull/97309