[llvm] [SandboxIR] Added a new LoadInst::create() with a isVolatile arg (PR #100781)

[Julius Alexandre via llvm-commits]

medievalghoul wrote:

@vporpo  

https://github.com/llvm/llvm-project/pull/100717#issuecomment-2253201562 to follow up this comment, I'll make sure to add a body and a test for this new function.

https://github.com/llvm/llvm-project/pull/100781