fix AF object handling with podman container engine

[neel-astro]

Description

Changes:

• Pick the right container engine when running the AF objects related command, as of now we are hard-coded to docker, instead of picking the right container engine. This PR fixes that logic and adds error handling around it.

Describe the purpose of this pull request.

🎟 Issue(s)

Related #1724

🧪 Functional Testing

Added/updated applicable unit tests

📸 Screenshots

Add screenshots to illustrate the validity of these changes.

📋 Checklist

• Rebased from the main (or release if patching) branch (before testing)
• Ran make test before taking out of draft
• Ran make lint before taking out of draft
• Added/updated applicable tests
• Tested against Astro-API (if necessary).
• Tested against Houston-API and Astronomer (if necessary).
• Communicated to/tagged owners of respective clients potentially impacted by these changes.
• Updated any related documentation