[develop] Add pyxis integration test

[hehe7318]

Description of changes

• Add test for Pyxis and Enroot functionality after configuration.
• This test creates a cluster with the necessary custom actions to configure Pyxis and Enroot.
• It submits two consecutive containerized jobs and verifies that they run successfully.

Tests

• Passed.

Checklist

• Make sure you are pointing to the right branch.
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• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

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