[llvm] [InstCombine] Fold (X * 0.0) * constant => X * 0.0 #85241 (PR #92512)

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SahilPatidar wrote:

> Reverse ping.

I think we need to resolve this [93769](https://github.com/llvm/llvm-project/issues/93769) before this. Please add your suggestions to this [PR](https://github.com/llvm/llvm-project/pull/94148).

https://github.com/llvm/llvm-project/pull/92512