fix http archive extraction for compatible bsdtar binaries

Summary:
- The `-P` flag seems necessary to extract through the UNC long path syntax. There is precedent for this, e.g. D51482034, D50643354
- cygwin tar also doesn't work, so we can opt to use the system tar instead. There is precedent for this, e.g. D51531469

Reviewed By: 8Keep

Differential Revision: D52856804

fbshipit-source-id: d8b5188657f54d902f1d95803cf948614e0c13d5

prelude/http_archive/http_archive.bzl

@@ -66,8 +66,9 @@ def _unarchive_cmd(
                 archive,
                 "--stdout",
                 "|",
-                "tar",
+                "%WINDIR%\\System32\\tar.exe",
                 "-x",
+                "-P",
                 "-f",
                 "-",
                 _tar_strip_prefix_flags(strip_prefix),