fix(helm): Enable volumeAttributesClassName attributes for volumeClaimTemplates

[matt-veitas-eb]

What this PR does / why we need it:
Add optional support to set the volumeAttributesClassName on volumeClaimTemplate to allow the underlying PVC attributes to be mutated. An example would be the IOPS or throughput settings for an AWS EBS volume

Which issue(s) this PR fixes:
Fixes #15071

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
  • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[CLAassistant]

All committers have signed the CLA.

[jkroepke]

Hi, please run make helm-docs