Support explicit Deployment and pod annotations for HyperDX

[mfroembgen]

Problem

hyperdx.deployment.annotations currently renders on spec.template.metadata.annotations, so it configures HyperDX pod annotations. The name does not make that scope clear, and the chart does not expose a value for annotations on the HyperDX Deployment object itself (metadata.annotations).

Proposed change

Expose two explicit, backward-compatible values:

• hyperdx.deployment.deploymentAnnotations for Deployment metadata.annotations
• hyperdx.deployment.podAnnotations for spec.template.metadata.annotations

Keep hyperdx.deployment.annotations as a deprecated pod annotation alias so existing values continue to work. When both pod annotation maps contain the same key, podAnnotations should take precedence.

For example:

hyperdx:
  deployment:
    deploymentAnnotations:
      example.com/controller: "enabled"
    podAnnotations:
      example.com/pod: "enabled"

All three values default to empty maps.