feat: add StorageClass definition in Helm charts

[ttryf]

What type of PR is this?
/kind feature

What this PR does / why we need it:
This pull request adds a new template to the Helm chart, that creates a StorageClass object upon installation.

Which issue(s) this PR fixes:
N/A

Special notes for your reviewer:
N/A

Does this PR introduce a user-facing change?:

feat: add StorageClass definition in Helm charts

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: ttryf / name: Thanos Tryfonidis (52b0190)

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[ttryf]

/easycla

[coveralls]

Pull Request Test Coverage Report for Build 8759303579

Details

• 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 78.915%

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Totals
Change from base Build 8731467405:	0.0%
Covered Lines:	887
Relevant Lines:	1124

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💛 - Coveralls

[andyzhangx]

/ok-to-test

[andyzhangx]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, ttryf

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• OWNERS [andyzhangx]

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