Change e2e tests to use common parallaxsecond docker image

[jn9e9]

I think it's fine to remove those Dockerfile and directly run ghcr.io/parallaxsecond/parsec-service-test-all in your test script.

Originally posted by @hug-dev in #32 (comment)

[jn9e9]

@hug-dev I think the current way of doing this works well. The extra docker container allows for the go lang installation which is needed (we shouldn't need to download toolchain every time we want to run ci-tests.)
Also, golang ci tests don't need to have parsec service rebuilt every time. This shortens the build/test lifecycle for debugging ci-tests. Can add a script option to re-build the docker container if required.