E2E tests for powerflex driver in the minimal manifest file

[meggm]

Description

E2E test for the powerflex driver for Minimal Manifest file

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#1449

Checklist:

• [X ] I have performed a self-review of my own code to ensure there are no formatting, vetting, linting, or security issues
• [ X] I have verified that new and existing unit tests pass locally with my changes
• [ X] I have not allowed coverage numbers to degenerate
• [ X] I have maintained at least 90% code coverage
• [ X] I have commented my code, particularly in hard-to-understand areas
• [ X] I have made corresponding changes to the documentation
• [ X] I have added tests that prove my fix is effective or that my feature works
• [ X] I have maintained backward compatibility

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

• [X ] Added the scenarios for observability E2E and have run the test in the k8s cluster.
  Below are the details.

powerflex_e2e_obs.txt