Adding missing test dirs to unit-test target

[lukeatdell]

Description

GitHub actions was only running unit test for the controller directory and repctl.
This commit creates new makefile targets for the directories with relevant code for which unit tests should be run.

Note: the make test target would have been used, but it also attempts to run the golang tests for e2e in the ./test directory.

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#1559

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 commented my code, particularly in hard-to-understand areas
• I have maintained backward compatibility

How Has This Been Tested?

Used the Makefile target make unit-test to execute the unit tests.