Also rework elixir dependency handling, so we no longer rely on mix to
fetch the rabbitmq_cli deps
Also:
- Specify ra version with a commit rather than a branch
- Fixup compilation options for erlang 23
- Add missing ra reference in MODULE.bazel
- Add missing flag in oci.yaml
- Reduce bazel rbe jobs to try to save memory
- Use bazel built erlang for erlang git master tests
- Use the same cache for all the workflows but windows
- Avoid using `mix local.hex --force` in elixir rules
- Fetching seems blocked in CI, and this should reduce hex api usage in
all builds, which is always nice
- Remove xref and dialyze tags since rules_erlang 3 includes them in
the defaults
Michal Kuratczyk
Rin Kuryloski