Fix protobuf script - only override protobuf-java

- Keep protobuf-bom to ensure protoc tools are available
- Don't touch protobuf-java-util, let BOM manage it
- Only customize protobuf-java runtime with unsafe disabled

Author: trask

.github/unsafe/build-custom-protobuf.sh

@@ -43,9 +43,7 @@ mvn install:install-file -q \
 
 # Update dependencies
 DEPS="${SCRIPT_DIR}/../../dependencyManagement/build.gradle.kts"
-sed -i '/com\.google\.protobuf:protobuf-bom:/d' "${DEPS}"
 sed -i '/com\.google\.protobuf:protobuf-java/d' "${DEPS}"
 sed -i '/^val DEPENDENCIES = listOf(/a\  "com.google.protobuf:protobuf-java:'"${CUSTOM_VERSION}"'",' "${DEPS}"
-sed -i '/^val DEPENDENCIES = listOf(/a\  "com.google.protobuf:protobuf-java-util:${ORIGINAL_VERSION}",' "${DEPS}"
 
 echo "protobuf-java ${CUSTOM_VERSION} built and installed (UNSAFE disabled)."