Fully support windows without `--enable_runfiles`

[UebelAndre]

rules_rust currently has some components that require --enable_runfiles and --windows_enable_symlinks to be set on windows. This should not be needed and all rules should work without requiring any flags.

Rules that require extra flags:

• cargo_build_script (Update cargo_build_script to work without runfiles support. #2871)
• rust_doc_test
• crate_universe