Added support for minimal manifests

[harishp8889]

Description

Need for a simple and minimal manifest file using existing Operator CRD.
Changes include adding the below default values in the code:

• Reverse proxy module for PowerMax driver
• Disable sdc-monitor and health-monitor by default
• Added the default check for kubelet config directory
• Fixed issues with initContainer and MDM key not found issue in PowerFlex driver

GitHub Issues

List the GitHub issues impacted by this PR:

GitHub Issue #
dell/csm#1449

Checklist:

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

• Tested against kubernetes cluster
• Ran unit tests

cert-csi Test report for certify suite for ISCSI powerstore driver
report-test-run-bfdfd42b.txt

cert-csi Test report for certify suite Unity driver
unity-cert-csi-report.txt

cert-csi test report for PowerScale:
isilon-cert-csi-report.txt

cert-csi test report for PowerFlex:
PR-powerflex-sanity-logs.txt