Add UDS test

[jmeixensperger]

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Add a simple test to check for the /opt/splunkforwarder/var/run/splunk/cli.socket file on UF containers.

This does not need to be merged ASAP and can wait until the next release.

This branch was based off python/ansible upgrade changes, which can be ignored. Marking this as a draft until these upgrades have been merged in and merge conflicts are resolved.