New CI pipelines

We have to start prepping for testing before/after OTP26 and Elixir 1.15 as a bunch of changes have taken place. I've also added a dialyzer stage that must be manually run for now until we get an image with the PLT data cached or it wastes too much CPU each run.

The elixir 1.15 tests are allowed to fail for now.

CI image building/deployment files were reorganized for this reason too