Update protobuf to 4.x to align with Spring #1590
Description
Expected Behavior
Spring Boot and common dependencies are aligned with the version of protobuf-java that we are using. If there are no breaking changes we should upgrade to version 4.x.. as we are currently in 3.x.
Actual Behavior
We are using a very old version of protobuf java. New stacks like the observability stack that uses grpc to stream metrics and logs to other services are already using 4.x
Steps to Reproduce the Problem
Release Note
RELEASE NOTE: