These symlink resolver tests build expected paths from `t.TempDir()`,
but the resolver canonicalizes symlink targets with
`filepath.EvalSymlinks`.
On macOS, `/var` resolves to `/private/var`, so the raw temp dir path
can disagree with the resolver output and flake. Use
`testutil.TempDirResolved` in the symlink-sensitive tests so the
expectations are canonicalized the same way.
Closes https://github.com/coder/internal/issues/1574
Closes ENG-2849
Ethan
a1ec9df345