feat(toolchain_utils): add 1.0.0-beta.4 (#1685)

Fixes `export.symlink` to work with multiple identical exports.

[Release
notes](https://gitlab.arm.com/bazel/toolchain_utils/-/releases/v1.0.0-beta.4)

Author: mattyclarkson

Diff for: modules/toolchain_utils/1.0.0-beta.4/MODULE.bazel

@@ -0,0 +1,23 @@
+module(
+    name = "toolchain_utils",
+    version = "1.0.0-beta.4",
+    bazel_compatibility = [
+        ">=7.0.0",
+    ],
+    compatibility_level = 1,
+)
+
+bazel_dep(name = "bazel_skylib", version = "1.4.2")
+bazel_dep(name = "platforms", version = "0.0.7")
+
+triplet = use_repo_rule("//toolchain/local/triplet:defs.bzl", "toolchain_local_triplet")
+
+triplet(
+    name = "local",
+)
+
+launcher = use_repo_rule("//toolchain/launcher:repository.bzl", "launcher")
+
+launcher(
+    name = "launcher",
+)

Diff for: modules/toolchain_utils/1.0.0-beta.4/presubmit.yml

@@ -0,0 +1,26 @@
+bcr_test_module:
+  module_path: e2e
+  matrix:
+    bazel:
+      - 7.x
+    platform:
+      - centos7_java11_devtoolset10
+      - debian10
+      - debian11
+      - ubuntu2004
+      - ubuntu2004_arm64
+      - ubuntu2204
+      - fedora39
+      - macos
+      # TODO: enable this once `@ape` gets Apple Silicon support as `rules_diff` uses `@ape//:diff`
+      # https://gitlab.arm.com/bazel/ape/-/issues/1
+      # - macos_arm64
+      # TODO: enable this once the runner has had a certificate refresh
+      # - windows
+  tasks:
+    run_tests:
+      name: Run end-to-end Tests
+      bazel: ${{ bazel }}
+      platform: ${{ platform }}
+      test_targets:
+        - "//..."

Diff for: modules/toolchain_utils/1.0.0-beta.4/source.json

@@ -0,0 +1,5 @@
+{
+  "url": "https://gitlab.arm.com/bazel/toolchain_utils/-/releases/v1.0.0-beta.4/downloads/src.tar.gz",
+  "integrity": "sha512-GVDim8MC4/zegiD97LbDE2R4nYzsr1gjbx5KJG0VNNe27fEm00gv9o7x7fjxj42g//RU8yDqAOUuOmhuxvF+Kw==",
+  "strip_prefix": "toolchain_utils-v1.0.0-beta.4"
+}

Diff for: modules/toolchain_utils/metadata.json

@@ -7,7 +7,8 @@
     "1.0.0-alpha.16",
     "1.0.0-beta.1",
     "1.0.0-beta.2",
-    "1.0.0-beta.3"
+    "1.0.0-beta.3",
+    "1.0.0-beta.4"
   ],
   "maintainers": [
     {