Added extraCreateMetadata to the chart

[pierluigilenoci]

Is this a bug fix or adding new feature?

New feature: added the chance to configure extraCreateMetadata in the CSI Provisioner container

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

Fixes #446

What testing is done?

Deployed on EKS cluster and tested

[k8s-ci-robot]

Hi @pierluigilenoci. Thanks for your PR.

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[pierluigilenoci]

@wongma7 could you please take a look?

[wongma7]

/ok-to-test
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: pierluigilenoci, wongma7

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[wongma7]

/lgtm

thanks.

helm chart release will come soon.