[llvm] [SandboxIR] Added new StoreInst::create() functions with isVolatile arg (PR #100961)

[via llvm-commits]

vporpo wrote:

> I noticed I can't directly request reviewers for SandboxIR contributions. 
Hmm what do you mean? Doesn't clicking on "Reviewers" and adding my or other people's name work?

https://github.com/llvm/llvm-project/pull/100961