Split up Makefile and further Podman support.

This MR continues the extensive changes identified for improved local dev/test cycles while still observing the requirement for testing via docker-in-docker during Gitlab CI/CD pipelines.

Changes have been made to better organize support Bash scripts and Makefiles into their appropriate sub-folders. We have chosen to avoid using tools such as Python to avoid the need to expanded decencies during testing re-writing scripts at this time may not provide extensive benefit.

In addition to these changes all Pavilion testing will correctly manage the working directory in the container layer and only relocated to the bind mount after jobs have been completed. This could remove issues experiences on Mac during local testing.

Closes: #40 (closed)