Use a uniquelly named maven to avoid conflicts with other repos.

Author: ratnikov

MODULE.bazel

@@ -28,6 +28,7 @@ IO_GRPC_GRPC_KOTLIN_ARTIFACTS = [
 
 maven = use_extension("@rules_jvm_external//:extensions.bzl", "maven")
 maven.install(
+    name = "grpc_kotlin_maven",
     artifacts = [
         "io.grpc:protoc-gen-grpc-kotlin:1.4.1",
         "com.google.jimfs:jimfs:1.3.0",
@@ -42,5 +43,5 @@ maven.install(
 use_repo(
     maven,
     "com_google_guava_guava",
-    "maven",
+    maven = "grpc_kotlin_maven",
 )