Revert "[Inliner] Propagate callee argument memory access attributes before inlining"

This exposes a miscompile reported in
https://github.com/llvm/llvm-project/issues/95152.

Whether the new inference or MemCpyOpt is at fault depends on
the precise semantics of writeonly attributes. Revert the patch
while this is being pinned down.

This reverts commit 285dbed1.
This reverts commit cda5790e.