chore(tests): update S3 compat tests

While present, the S3 compatibility tests were broken (at the very
least when running on Linux) due to a few issues:

- `ubuntu:latest` moving ahead of Python 3.6
- Docker networking not working as expected (host.docker.internal)

This commit fixes the s3 compatibility tests, ensuring they run
properly on linux, and updates the repository to contain some results.

Signed-off-by: vados <vados@vadosware.io>

test/s3/compatibility/Makefile

@@ -0,0 +1,9 @@
+.PHONY: all build-image test
+
+all: build-image test
+
+build-image:
+	./prepare.sh
+
+test:
+	./run.sh