[clang] [llvm] [IR] Add flags operand to structured.gep (PR #200093)

[Krzysztof Drewniak via cfe-commits]

krzysz00 wrote:

@dtcxzyw The fuzzed issue has been fixed, can you remove your changes-requested unless you have other objections?

https://github.com/llvm/llvm-project/pull/200093