feat(api): return version and skiprange in bundle

[ecordell]

Description of the change:
Adds version and skiprange fields to bundle api responses.

Motivation for the change:
This will allow us to remove the remaining CSV parsing from OLM.

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[ecordell]

/hold

holding for #89 which also adds a migration

[kevinrizza]

/lgtm

[ecordell]

/hold cancel

[ecordell]

snuck in a very small fix for the mirror mapping as well - just didn't want to block up our merge queue

[ecordell]

/retest

[jpeeler]

/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ecordell, jpeeler, kevinrizza

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [ecordell,jpeeler]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment