[draft] Add pvs.yaml template and remove empty lines from values.yaml

[patrykw-splunk]

Description

This PR adds support for creation of PVs per CR to the helm deployments. This is a result of #1509 change, and should be merged after it.
As an addition I've also removed empty lines from values.yaml to adjust it to the universal standards of Helm-charts

Key Changes

• new template for creation of Persistent Volumes per CR - pvs.yaml
• move of CRs specific configs under customResources block in `values.yaml
• adjustments of templates regarding previous point
• deletion of empty lines in values.yaml

Testing and Verification

local tests
helm template release-splunk . -n splunk-operator --set customResources.standalone.enablePersistentVolume=true --set splunk-operator.enabled=false --set installCRDs=false & addition of adjusted values.yaml`

Related Issues

• feature: add support for pre-created PVs - admin-managed-pv annotation #1509

PR Checklist

• Code changes adhere to the project's coding standards.
• [N/A] Relevant unit and integration tests are included.
• Documentation has been updated accordingly.
• All tests pass locally.
• The PR description follows the project's guidelines.

[coveralls]

Pull Request Test Coverage Report for Build 15190106022

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 86.613%

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Totals
Change from base Build 14926894990:	0.0%
Covered Lines:	10546
Relevant Lines:	12176

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💛 - Coveralls