fix(charts): correct default chart values

[jnels124]

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Why is this PR required? What issue does it fix?:
Gets rid of warning message when deploying helm chart

What this PR does?:
Corrects the default values for the helm chart. The usage in the chart expects these values to be dictionaries, not arrays.

Does this PR require any upgrade changes?:
no

If the changes in this PR are manually verified, list down the scenarios covered::
deployed chart locally with changes to ensure warning message went away and verified successful deployment

Any additional information for your reviewer? :
Mention if this PR is part of any design or a continuation of previous PRs

Checklist:

• Fixes Default values are of the wrong type #505
• PR Title follows the convention of <type>(<scope>): <subject>
• Has the change log section been updated?
• Commit has unit tests
• Commit has integration tests
• (Optional) Are upgrade changes included in this PR? If not, mention the issue/PR to track:
• (Optional) If documentation changes are required, which issue on https://github.com/openebs/openebs-docs is used to track them: