Update GoogleCloudStorageOptions to be protobuf 4.x compliant

[wleese]

Since Spring Cloud GCP 5.9.0 upgraded protobuf from 3.x to 4.x to fix an undisclosed CVE, applications that use the beam SDK (which depends on this project) and pull in hadoop-connectors, run into version mismatch issues.

java.lang.NoSuchMethodError: 'java.lang.Object com.google.protobuf.DescriptorProtos$ServiceOptions.getExtension(com.google.protobuf.GeneratedMessage$GeneratedExtension)'   

A PR was already made here:
#1270 .. but no updated for a while now.

Currently, Spring Cloud GCP 5.9.0 + Beam SDK (any version) or more specifically hadoop-connectors users will be exposed to the undisclosed CVE when downgrading to resolve this issue.