kctrl: export section in pkg build should have an option to get package bundle content as release.yml also.

**Describe the problem/challenge you have**
kctrl: export section in pkg build should have the option to get package bundle content as release.yml also. This way, while doing `kctrl package release`, users can get `release.yml` as output as well along with `package.yml`.

**Describe the solution you'd like**
[A clear and concise description of what you want to happen. If applicable a visual representation of the UX.]

**Anything else you would like to add:**
[Additional information that will assist in solving the issue.]

---
Vote on this request

This is an invitation to the community to vote on issues, to help us prioritize our backlog. Use the "smiley face" up to the right of this comment to vote.

👍 "I would like to see this addressed as soon as possible"
👎 "There are other more important things to focus on right now"

We are also happy to receive and review Pull Requests if you want to help working on this issue.