[influxdb2] add namespace to resources

[KarlisAG]

This PR adds namespace to all Helm chart resources, which is meant to allow helm template to show namespace in the resources as well. The absence of which can cause some test tools, for example, kyverno-cli to fail due to missing namespace, which is a part of its best practice policies. This namespace adding structure was inspired from how promtail does it.

It was tested via helm lint and helm template to confirm the output matched the expectation

• CHANGELOG.md updated
• Rebased/mergable
• Tests pass
• Sign CLA (if not already signed)