Add pdb file to output group when target_os is "uefi"

When building uefi target with aarch64-unknown-uefi/x86_64-unknown-uefi, the compiler can also generate a PDB file. But because target_os is "uefi" in this case, the file is not added to the output group (currently only "windows" is supported https://github.com/bazelbuild/rules_rust/blob/main/rust/private/rustc.bzl#L1380).

Start in rust/private/rustc.bzl around line 1380, where the output group currently handles target_os "windows". Check how the uefi targets produce PDB files and update the output-group handling so those files are included for target_os "uefi". Done means builds for aarch64-unknown-uefi and x86_64-unknown-uefi expose the generated PDB in the output group.

Written by the indexing model from the issue text.