[llvm] [IR] Disallow ZeroInit for spirv.Image (PR #73887)

[Wenju He via llvm-commits]

wenju-he wrote:

@jcranmer-intel could you please take a look?
Before this PR, there could be following ir generated:
```
store target("spirv.Image", void, 1, 0, 0, 0, 0, 0, 0) zeroinitializer, ptr addrspace(4) %MImageObj, align 8
```
llvm-spirv translator isn't able to handle it due to spec requirement.

https://github.com/llvm/llvm-project/pull/73887