Reexported intrinsics show up in rustdoc search instead of their proper paths

[theemathas]

The following functions appear to be intrinsics that are re-exported at a different path (see also: #113387):

• intrinsics::transmute -> mem::transmute
• intrinsics::copy -> ptr::copy
• intrinsics::copy_nonoverlapping -> ptr::copy_nonoverlapping
• intrinsics::write_bytes -> ptr::write_bytes

Searching for these only finds the functions in std::intrinsics. (And for specifically transmute, it also shows core::mem::transmute for some reason.) The search result should ideally show the functions in std::mem/ptr. See below screenshots obtained by searching for transmute and searching for copy_nonoverlapping

[kpreid]

Possibly related: intra-doc links to std::mem::transmute or core::mem::transmute also end up linking to the intrinsic page.