Allow docker image & pytest plugins to be configured in integration tests

[cameron-craig-etas]

What

Currently we have a hard coded docker image which we use for all integration tests. For certain tests, we would like to be able to use a different docker image. To allow this should add arguments to our integration_test Bazel macro to allow the configuration of the docker image and tag.

Also, for some tests it is useful to have the option to specify pytest plugins. These plugins should be forwarded to py_itf_test. We currently use a number of hard coded plugins, but do not allow configuration per test.

Acceptance Criteria (DoD)

• Docker image and tag can be configured per test
• Additional pytest plugins can be provided to integration tests

How

• Add docker_image_target and docker_image_tag arguments in tests/utils/bazel/integration.bzl to allow configuration of the docker image.