Replace create_embedded_tools.sh with a faster Python version.

This is functionally equivalent, but ~30x faster on Windows, ~2x faster on macOS and ~1.5x faster on Linux.

RELNOTES: None.

Change-Id: Ib4a7e10400a3955e47772425acfce2d9530de462
PiperOrigin-RevId: 163346634
diff --git a/scripts/bootstrap/compile.sh b/scripts/bootstrap/compile.sh
index 494c1a1..4280e00 100755
--- a/scripts/bootstrap/compile.sh
+++ b/scripts/bootstrap/compile.sh
@@ -345,6 +345,7 @@
       --ignore_unsupported_sandboxing \
       --startup_time=329 --extract_data_time=523 \
       --rc_source=/dev/null --isatty=1 \
+      --build_python_zip \
       "${client_env[@]}" \
       --client_cwd="$(get_cwd)" \
       "${@}"