Add Helm Test to cover additional attributes introduced in values.yaml used during kanister operator installation

[mabhi]

Change Overview

Now that support has been added PR for tolerations and nodeSelector in the kanister helm chart, they need to be tested via helm-tests. With additional support for dry-run with PR we can run helm install dry run on these charts and rendered output can be validated. This PR specifically does the above requirement by adding helm tests to validate the properties are populated with the provided helm values.

Pull request type

Please check the type of change your PR introduces:

• [ ] :construction: Work in Progress
• [ ] :rainbow: Refactoring (no functional changes, no api changes)
• [ ] :hamster: Trivial/Minor
• [ ] :bug: Bugfix
• [ ] :sunflower: Feature
• [ ] :world_map: Documentation
• [x] :robot: Test

Issues

• fixes #issue-number

Test Plan

• [ ] :muscle: Manual
• [x] :zap: Unit test
• [ ] :green_heart: E2E

[viveksinghggits]

@mabhi can you please correct the title of the PR.