Make rabbitmq-server work with rules_erlang 3

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

1 files changed, 8 insertions, 5 deletions

diff --git a/tools/erlang_ls.bzl b/tools/erlang_ls.bzl
index f767255ce2..2dbdea821b 100644
--- a/tools/erlang_ls.bzl
+++ b/tools/erlang_ls.bzl
@@ -1,9 +1,12 @@
-load("@rules_erlang//:erlang_home.bzl", "ErlangHomeProvider")
+load(
+    "@rules_erlang//tools:erlang_toolchain.bzl",
+    "erlang_dirs",
+)
 
 def _impl(ctx):
     out = ctx.actions.declare_file(ctx.label.name)
 
-    erlang_home = ctx.attr._erlang_home[ErlangHomeProvider].path
+    (erlang_home, _, _) = erlang_dirs(ctx)
 
     ctx.actions.write(
         output = out,
@@ -32,7 +35,7 @@ plt_path: bazel-bin/deps/rabbit/.base_plt.plt
 
 erlang_ls_config = rule(
     implementation = _impl,
-    attrs = {
-        "_erlang_home": attr.label(default = "@rules_erlang//:erlang_home"),
-    },
+    toolchains = [
+        "@rules_erlang//tools:toolchain_type",
+    ],
 )