[llvm] [SandboxIR] Implement Instruction flags (PR #103343)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

We ran into a similar issue: https://github.com/llvm/llvm-project/pull/93850.
There is a new NoUSWrap for geps.

https://github.com/llvm/llvm-project/pull/103343