Replace rules_pip with rules_python; use bazel built upstream grpc
instead of Python packages

As usual with Python sadness, the @pydeps wheels are built on the bazel
host, so stuffing them inside a container_image (or py_image) will cause
new and unexpected kinds of misery.

Change-Id: Id4e4d53741cf2da367f01aa15c21c133c5cf0dba
diff --git a/personal/q3k/BUILD b/personal/q3k/BUILD
index 99e661d..8317e7c 100644
--- a/personal/q3k/BUILD
+++ b/personal/q3k/BUILD
@@ -1,7 +1,9 @@
+load("@pydeps//:requirements.bzl", "requirement")
+
 py_binary(
     name = "django-admin",
     srcs = ["django-admin.py"],
     deps = [
-        "@pydeps36//django",
+        requirement("django"),
     ]
 )