bazel: Verify Maven deps in bzlmod and WORKSPACE match

The text between the GRPC_DEPS_{START,END} must be identical in
formatting. Probably not a problem in general and not necessarily bad.
But it is simplistic.

Eric waking up this morning:
> We need more sed.

.github/workflows/testing.yml

@@ -81,6 +81,11 @@ jobs:
     steps:
     - uses: actions/checkout@v3
 
+    - name: Check versions match in MODULE.bazel and repositories.bzl
+      run: |
+        diff -u <(sed -n '/GRPC_DEPS_START/,/GRPC_DEPS_END/ {/GRPC_DEPS_/! p}' MODULE.bazel) \
+                <(sed -n '/GRPC_DEPS_START/,/GRPC_DEPS_END/ {/GRPC_DEPS_/! p}' repositories.bzl)
+
     - name: Bazel cache
       uses: actions/cache@v3
       with:

MODULE.bazel

@@ -5,36 +5,8 @@ module(
     version = "0",
 )
 
-bazel_dep(name = "googleapis", repo_name = "com_google_googleapis", version = "0.0.0-20240326-1c8d509c5")
+# GRPC_DEPS_START
-bazel_dep(name = "grpc", repo_name = "com_github_grpc_grpc", version = "1.56.3.bcr.1")
+IO_GRPC_GRPC_JAVA_ARTIFACTS = [
-bazel_dep(name = "protobuf", repo_name = "com_google_protobuf", version = "23.1")
-bazel_dep(name = "rules_cc", version = "0.0.9")
-bazel_dep(name = "rules_go", repo_name = "io_bazel_rules_go", version = "0.46.0")
-bazel_dep(name = "rules_jvm_external", version = "6.0")
-bazel_dep(name = "rules_proto", version = "5.3.0-21.7")
-
-non_module_deps = use_extension("//:repositories.bzl", "grpc_java_repositories_extension")
-
-use_repo(
-    non_module_deps,
-    "com_github_cncf_xds",
-    "envoy_api",
-    "io_grpc_grpc_proto",
-)
-
-grpc_repo_deps_ext = use_extension("@com_github_grpc_grpc//bazel:grpc_deps.bzl", "grpc_repo_deps_ext")
-
-use_repo(
-    grpc_repo_deps_ext,
-    "com_envoyproxy_protoc_gen_validate",
-    "com_github_cncf_udpa",
-    "opencensus_proto",
-)
-
-maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
-
-maven.install(
-    artifacts = [
     "com.google.android:annotations:4.1.1.4",
     "com.google.api.grpc:proto-google-common-protos:2.29.0",
     "com.google.auth:google-auth-library-credentials:1.22.0",
@@ -70,7 +42,39 @@ maven.install(
     "junit:junit:4.13.2",
     "org.apache.tomcat:annotations-api:6.0.53",
     "org.codehaus.mojo:animal-sniffer-annotations:1.23",
-    ],
+]
+# GRPC_DEPS_END
+
+bazel_dep(name = "googleapis", repo_name = "com_google_googleapis", version = "0.0.0-20240326-1c8d509c5")
+bazel_dep(name = "grpc", repo_name = "com_github_grpc_grpc", version = "1.56.3.bcr.1")
+bazel_dep(name = "protobuf", repo_name = "com_google_protobuf", version = "23.1")
+bazel_dep(name = "rules_cc", version = "0.0.9")
+bazel_dep(name = "rules_go", repo_name = "io_bazel_rules_go", version = "0.46.0")
+bazel_dep(name = "rules_jvm_external", version = "6.0")
+bazel_dep(name = "rules_proto", version = "5.3.0-21.7")
+
+non_module_deps = use_extension("//:repositories.bzl", "grpc_java_repositories_extension")
+
+use_repo(
+    non_module_deps,
+    "com_github_cncf_xds",
+    "envoy_api",
+    "io_grpc_grpc_proto",
+)
+
+grpc_repo_deps_ext = use_extension("@com_github_grpc_grpc//bazel:grpc_deps.bzl", "grpc_repo_deps_ext")
+
+use_repo(
+    grpc_repo_deps_ext,
+    "com_envoyproxy_protoc_gen_validate",
+    "com_github_cncf_udpa",
+    "opencensus_proto",
+)
+
+maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
+
+maven.install(
+    artifacts = IO_GRPC_GRPC_JAVA_ARTIFACTS,
     repositories = [
         "https://repo.maven.apache.org/maven2/",
     ],

repositories.bzl

@@ -9,6 +9,7 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 #         # Your own deps
 #     ] + IO_GRPC_GRPC_JAVA_ARTIFACTS,
 # )
+# GRPC_DEPS_START
 IO_GRPC_GRPC_JAVA_ARTIFACTS = [
     "com.google.android:annotations:4.1.1.4",
     "com.google.api.grpc:proto-google-common-protos:2.29.0",
@@ -46,6 +47,7 @@ IO_GRPC_GRPC_JAVA_ARTIFACTS = [
     "org.apache.tomcat:annotations-api:6.0.53",
     "org.codehaus.mojo:animal-sniffer-annotations:1.23",
 ]
+# GRPC_DEPS_END
 
 # For use with maven_install's override_targets.
 # maven_install(