Use rules_erlang 3.1.0

From github directly, until
https://github.com/bazelbuild/bazel-central-registry/pull/96 is merged

MODULE.bazel

@@ -5,10 +5,10 @@ module(
 
 bazel_dep(name = "rules_erlang", version = "3.0.1")
 
-git_override(
+archive_override(
     module_name = "rules_erlang",
-    remote = "https://github.com/rabbitmq/rules_erlang.git",
-    commit = "ff558e15ab6dc90e9d7e4aabebb5b519447c3318",
+    urls = ["https://github.com/rabbitmq/rules_erlang/archive/refs/tags/3.1.0.zip"],
+    strip_prefix = "rules_erlang-3.1.0",
 )
 
 erlang_package = use_extension(
@@ -180,7 +180,7 @@ erlang_package.hex_package(
 
 erlang_package.git_package(
     repository = "rabbitmq/ra",
-    commit = "fcaad359a4e64f87357acbcc84f01e0377706ce3",
+    branch = "main",
     patch_cmds = ["""
 VERSION=$(git rev-parse HEAD)
 echo "Injecting ${VERSION} into ra.app.src..."

WORKSPACE.bazel

@@ -54,8 +54,8 @@ git_repository(
 
 git_repository(
     name = "rules_erlang",
-    commit = "ff558e15ab6dc90e9d7e4aabebb5b519447c3318",
     remote = "https://github.com/rabbitmq/rules_erlang.git",
+    tag = "3.1.0",
 )
 
 load(

bazel/elixir/elixir_toolchain.bzl

@@ -49,14 +49,14 @@ def elixir_dirs(ctx, short_path = False):
         p = info.release_dir.short_path if short_path else info.release_dir.path
         return (p, ctx.runfiles([info.release_dir, info.version_file]))
 
-def maybe_copy_erlang(ctx, short_path = False):
+def maybe_install_erlang(ctx, short_path = False):
     info = _build_info(ctx)
     release_dir = info.release_dir
     if release_dir == None:
         return ""
     else:
         return """mkdir -p $(dirname "{erlang_home}")
-ln -sf $PWD/{erlang_release_dir} "{erlang_home}"
+cp -r {erlang_release_dir} "{erlang_home}"
 ERTS_DIRNAME="$(basename "$(echo "{erlang_home}"/erts-*)")"
 ln -sf ../$ERTS_DIRNAME/bin/epmd "{erlang_home}"/bin/epmd
 """.format(

bazel/elixir/iex_eval.bzl

@@ -2,7 +2,7 @@ load(
     ":elixir_toolchain.bzl",
     "elixir_dirs",
     "erlang_dirs",
-    "maybe_copy_erlang",
+    "maybe_install_erlang",
 )
 
 def _impl(ctx):
@@ -16,7 +16,7 @@ def _impl(ctx):
 
     script = """set -euo pipefail
 
-{maybe_copy_erlang}
+{maybe_install_erlang}
 
 if [[ "{elixir_home}" == /* ]]; then
     ABS_ELIXIR_HOME="{elixir_home}"
@@ -31,7 +31,7 @@ export OUTS="{outs}"
 
 ${{ABS_ELIXIR_HOME}}/bin/iex --eval "$1"
 """.format(
-        maybe_copy_erlang = maybe_copy_erlang(ctx),
+        maybe_install_erlang = maybe_install_erlang(ctx),
         erlang_home = erlang_home,
         elixir_home = elixir_home,
         srcs = ctx.configuration.host_path_separator.join([src.path for src in ctx.files.srcs]),

bazel/mix/mix_app.bzl

@@ -15,7 +15,7 @@ load(
     "//bazel/elixir:elixir_toolchain.bzl",
     "elixir_dirs",
     "erlang_dirs",
-    "maybe_copy_erlang",
+    "maybe_install_erlang",
 )
 
 def find_mix_exs(files):
@@ -60,7 +60,7 @@ def _impl(ctx):
 
     script = """set -euo pipefail
 
-{maybe_copy_erlang}
+{maybe_install_erlang}
 
 if [[ "{elixir_home}" == /* ]]; then
     ABS_ELIXIR_HOME="{elixir_home}"
@@ -92,7 +92,7 @@ fi
 # is not used, and bazel does not allow them
 find ${{MIX_BUILD_PATH}} -type l -delete
 """.format(
-        maybe_copy_erlang = maybe_copy_erlang(ctx),
+        maybe_install_erlang = maybe_install_erlang(ctx),
         package = ctx.label.package,
         erlang_home = erlang_home,
         elixir_home = elixir_home,