Unable to update showcase golden files

[blakeli0]

Tried to update the showcase golden files by mvn compile -P update resulted in the following errors:

Error: EACCES: permission denied, unlink '/workspace/java-common-protos/proto-google-common-protos/src/main/proto/google/shopping/type/com/google/shopping/type/Channel.java'

This could be mitigated by chown -R $(id -u) sdk-platform-java/, but then the following errors occurred:

#54 22.56 [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.13.0:compile (default-compile) on project gax: Compilation failure: Compilation failure: 
#54 22.56 [ERROR] /sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/rpc/ErrorDetails.java:[37,22] package com.google.rpc does not exist
#54 22.56 [ERROR] /sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/rpc/ErrorDetails.java:[38,22] package com.google.rpc does not exist
#54 22.56 [ERROR] /sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/rpc/ErrorDetails.java:[39,22] package com.google.rpc does not exist
#54 22.56 [ERROR] /sdk-platform-java/gax-java/gax/src/main/java/com/google/api/gax/rpc/ErrorDetails.java:[40,22] package com.google.rpc does not exist

We probably need to update the showcase scripts to solve the permission and compilation issues.