[bzlmod] Set repo_name to com_google_protobuf (#16495)

This is currently required by 8d025c08ff/upb_generator/bootstrap_compiler.bzl (L30)

We could try to change it but this is fine to do for now

Closes #16495

COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/16495 from keith:ks/bzlmod-set-repo_name-to-com_google_protobuf 357776de4a
PiperOrigin-RevId: 625820218

MODULE.bazel

@@ -24,11 +24,5 @@ bazel_dep(name = "rules_python", version = "0.10.2")
 bazel_dep(name = "platforms", version = "0.0.8")
 bazel_dep(name = "zlib", version = "1.2.11")
 
-<<<<<<< checkout/google3/third_party/protobuf/github/MODULE.bazel
 # TODO: remove after toolchain types are moved to protobuf
-bazel_dep(name = "rules_proto", version = "4.0.0")
-||||||| baseline/google3/third_party/protobuf/github/MODULE.bazel
-# TODO: remove after toolchain types are moved to protobuf
-bazel_dep(name = "rules_proto", version = "4.0.0")=======
-# TODO: remove after toolchain types are moved to protobuf
-bazel_dep(name = "rules_proto", version = "4.0.0")>>>>>>> destination/google3/third_party/protobuf/github/MODULE.bazel
+bazel_dep(name = "rules_proto", version = "4.0.0")