Integration tests are failing in Github runners on track/1.15

[i-chvets]

Bug Description

On track/1.15 integraion tests fail in Github runners.

To Reproduce

Create a debug PR and observe integration test triggered by workflow in Github runnner.
Example real PR that failed after many attempts: #186

Environment

Github runner action On Pull Request https://github.com/canonical/seldon-core-operator/actions/workflows/on_pull_request.yaml

Relevant log output

Output of integration tests that fail in Github runner:
https://github.com/canonical/seldon-core-operator/actions/runs/5694773152/job/16153113024?pr=186

Additional context

There were a series of fixes on main branch that made Seldon integration more reliable. These should be reviewed and probably ported/cherry-picked into track/1.15 branch.
#190
#188
#187

[i-chvets]

FIx has been merged. Closing.