Resolved ProbeController conflict by adding common protobuf

[walker2]

Description

Resolved conflict between replication and volume group snapshot extensions by adding separate common protobuf that contains ProbeController method

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#128

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works