ci: re-enable bzlmod in asan build (#15073)

Author: scotthart

ci/cloudbuild/builds/asan.sh

@@ -23,10 +23,7 @@ source module ci/cloudbuild/builds/lib/integration.sh
 source module ci/lib/io.sh
 
 mapfile -t args < <(bazel::common_args)
-args+=(--config=asan
-  # TODO(#14874): re-enable bzlmod once BCR grpc module is fixed.
-  --noenable_bzlmod
-)
+args+=(--config=asan)
 io::run bazel test "${args[@]}" --test_tag_filters=-integration-test "${BAZEL_TARGETS[@]}"
 
 mapfile -t integration_args < <(integration::bazel_args)