stdlib suggests using selfExePathAlloc instead of selfExePath on wasi even though the former calls the latter

[xdBronch]

Zig Version

0.12.0-dev.278+0e8f130ae

Steps to Reproduce and Observed Behavior

attempt to use std.fs.selfExePath with wasi as the target OS
met with error message std.fs.selfExePath not supported for WASI. Use std.fs.selfExePathAlloc instead.

zig/lib/std/fs.zig

Line 3072 in b0d9bb0

.wasi => @compileError("std.fs.selfExePath not supported for WASI. Use std.fs.selfExePathAlloc instead."),

use selfExePathAlloc as suggested but same error

zig/lib/std/fs.zig

Line 2977 in b0d9bb0

return allocator.dupe(u8, try selfExePath(&buf));

Expected Behavior

compile error should give a correct message

[squeek502]

The Use std.fs.selfExePathAlloc instead. part of that compile error is obsolete and should be removed.

Here's where the compile error was added along with some special casing in selfExePathAlloc:
922d837

And here's where that special casing was moved outside the standard library since it was Zig-specific:
#11469

And here's the reasoning:
#11024 (comment)

Side note: I'm not sure it's possible to implement selfExePath for WASI.