Bazel bzlmod support for grpc-web. (grpc#1456)

* Bazel bzlmod support for grpc-web.

Updates the bazel-based build of grpc-web to use bzlmod.

The WORKSPACE file is retained for now, but it should probably be deleted since
it should be unused.

* Delete WORKSPACE files.

* bazel mod tidy

* MODULE.bazel fixups

* Update version to 1.6.0.rc1 in MODULE.bazel

* Update module and dockerfile in response to pr comments about build failure and protobuf version

* Fix lint issue with MODULE.bazel

.bazelrc

@@ -1 +1,14 @@
 build --copt=-Wno-error=deprecated-declarations --host_copt=-Wno-error=deprecated-declarations
+
+# Required until this is the default; expected in Bazel 7
+common --enable_bzlmod
+
+# Load any settings specific to the current user.
+# .bazelrc.user should appear in .gitignore so that settings are not shared with team members
+# This needs to be last statement in this
+# config, as the user configuration should be able to overwrite flags from this file.
+# See https://docs.bazel.build/versions/master/best-practices.html#bazelrc
+# (Note that we use .bazelrc.user so the file appears next to .bazelrc in directory listing,
+# rather than user.bazelrc as suggested in the Bazel docs)
+try-import %workspace%/.bazelrc.user
+

MODULE.bazel

@@ -0,0 +1,24 @@
+"""
+A bazel module for the grpc-web project.
+
+Visit https://grpc.io/ and https://github.com/grpc/grpc-web for
+more information about the project.
+"""
+
+module(
+    name = "grpc-web",
+    version = "1.6.0",
+    compatibility_level = 1,
+    repo_name = "com_github_grpc_grpc_web",
+)
+
+bazel_dep(name = "protobuf", version = "27.1", repo_name = "com_google_protobuf")
+bazel_dep(name = "grpc", version = "1.65.0", repo_name = "com_github_grpc_grpc")
+bazel_dep(name = "rules_cc", version = "0.0.2")
+bazel_dep(name = "rules_proto", version = "6.0.2")
+
+# Needed to resolve https://github.com/bazelbuild/bazel-central-registry/issues/2538.
+single_version_override(
+    module_name = "grpc-java",
+    version = "1.64.0",
+)