Allow all fields to be set on StorageClasses

[haines]

Is this a bug fix or adding new feature?
A new feature

What is this PR about? / Why do we need it?

The StorageClasses created by the Helm chart can currently only be configured with volumeBindingMode, reclaimPolicy, and parameters. We have allowVolumeExpansion: true set on ours, so we couldn't migrate them to be provisioned by the chart.

This PR allows any field permitted by the API to be specified.

What testing is done?

I've templated the chart with a variety of StorageClasses and validated that the output manifests are correct.

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[k8s-ci-robot]

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[coveralls]

Pull Request Test Coverage Report for Build 1571

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 81.286%

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Totals
Change from base Build 1569:	0.0%
Covered Lines:	1707
Relevant Lines:	2100

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💛 - Coveralls

[ayberk]

TIL!

[ayberk]

/ok-to-test

@haines thanks for your contribution! Could you please update the chart version as well?

[haines]

Thanks for reviewing, @ayberk! I've rebased onto master and bumped the chart version.

[ayberk]

/lgtm
/approve

Thanks a lot!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ayberk, haines

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