These tests are testing functionality that is no longer in use in
production deployments of Boulder. As we go about removing wfe1
functionality, these tests will break, so let's just remove them
wholesale right now. I have verified that all of the tests removed in
this PR are duplicated against wfe2.
One of the changes in this PR is to cease starting up the wfe1 process
in the integration tests at all. However, that component was serving
requests for the AIA Issuer URL, which gets queried by various OCSP and
revocation tests. In order to keep those tests working, this change also
adds an integration-test-only handler to wfe2, and updates the CA
configuration to point at the new handler.
Part of #5681
Aaron Gable