Prepopulate "Add Deployment" page with query parameters

[dan-kirberger]

Description

Right now you can go to the "Create Deployment" page in Vela to request a new deployment:

It would be slick if we could help auto-populate those fields, perhaps visiting a link like this:

https://vela.prod.target.com/MY_ORG/MY_REPO/add-deployment?target=prod&ref=v1.2.3&etc...

This would still load the form (NOT submit it automatically), but would pre-populate the relevant fields.

Value

We have tooling (and slack messages) that could generate these links for engineers to use to simplify promoting code to higher environments.

Perhaps after a build completes in the main branch, we send this message to slack "to promote this to prod, use ".

Personally, for my team we aren't using deployments yet, but I'd like to (as a way to standardize how we deploy), this would help simplify wrangling those releases.

[cognifloyd]

This is a duplicate of #451

[dan-kirberger]

Ha, both made by me, less than two months apart. 🤷