[Controller] Improve readability of logs during reconcile loop

Closes #78 (closed)

Improves the readability of the logs during the reconcile loop by:

• Increasing log level on some log entries that should only be needed when debugging
• Adding log entries to the createKubernetesResource function
• Renaming the createKubernetesResource function to createIfNotExists to clarify what it's actually doing
• Removing extra log entries that were created next to createIfNotExits, letting the function handle log entries in a more centralized and standard approach
• Adjusting the placement of log entries for the runJobAndWait method to better communicate what the controller is doing for each loop

Testing instructions

Deploy to a cluster and watch the logs in the GitLab Operator. You should notice much less volume in the logs. Any feedback on what would be helpful to add / remove / tweak is welcome!