Flatten SQL data plane instance store properties

# Feature Request

Currently the DataPlaneInstance store SQL version store just an ID and a column `data` which i the JSON representation of the `DataPlaneInstance` object. We should probably think about flattening the JSON properties into columns since they are best managed (search/index) and the basic structure is fixed.

It also aligns with the other SQL stores

## Which Areas Would Be Affected?

_e.g., DPF, CI, build, transfer, etc._

## Why Is the Feature Desired?

_Are there any requirements?_

## Who will sponsor this feature?

_Please @-mention the committer that will sponsor your feature_.

## Solution Proposal

_If possible, provide a (brief!) solution proposal._