Change Version API to mirror Metadata API

What does this MR do and why?

This MR changes the Version API to mirror Metadata API #375649 (closed).

We can do this as the Metadata API is a complete superset of the Version API, and the change is additive and non-breaking.

How to set up and validate locally

These two curls should be identical.

curl --location --request GET '<HOST_NAME>/api/v4/version?private_token=<TOKEN>'
curl --location --request GET '<HOST_NAME>/api/v4/metadata?private_token=<TOKEN>'

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #375649 (closed)