Develop luca

[LucaCinquini]

Purpose

The purpose of this PR is to improve the DAG that is used to test scalability with Karpenter. Specifically:

• The DAG id is the same as the Python file name, except for the extension
• The Docker image used is "busybox" which allows for configurable runtimes
• The affinity dictionary is obtained through a standalone function

In addition, the GitSync process to sync with the remote DAG repository points to the "develop" branch by default.

Proposed Changes

• [CHANGE] Update the karpenter_test.py as outlined above
• [FIX] Use "develop" as the default branch to git-sync the DAGs

Issues

• [New feature]: Concurrent Execution of N SBG end-to-end workflows #64

Testing

• Executed 10 concurrent "karpenter_test" DAG runs, they all succeeded. Confirmed that 10 new nodes are created by Karpenter for each task, then deleted.