Simplified the process of constructing and executing container commands
to enhance maintainability and reduce redundancy.
- Removed redundant appending of image_tag and action to docker_opts in
run.cr.
- Modified command construction in docker_engine.cr to use pre-built cmd
array, enhancing clarity.
- Updated podman_engine.cr to utilize cmd array for process execution,
ensuring consistency across container engines.
Signed-off-by: Glenn Y. Rolland <glenux@glenux.net>