Bazel's `Runfiles::Create()` does not actually need a value for `argv0` in
order to find runfiles for the current `cc_binary`.
- Rename `runfiles.cc` to `runfiles_nobazel.cc`
PiperOrigin-RevId: 443061178
Change-Id: I31e16d69d24aecbc403f9407fc08c615bb1e8f9f