chore(tilt): generate tilt file

[zsinnema]

Closes CH-X

Sanity checks:

• The pull request is explicitly linked to the relevant issue(s)
• The issue is well described: clearly states the problem and the general proposed solution(s)
• In this PR it is explicitly stated how to test the current change
• The labels in the issue set the scope and the type of issue (bug, feature, etc.)
• The relevant components are indicated in the issue (if any)
• All the automated test checks are passing
• All the linked issues are included in one Sprint
• All the linked issues are in the Review state
• All the linked issues are assigned

[filippomc]

Need to integrate documentation on the presence of this functionality and how to use it.
Also why "chore" for a cool new functionality? :)

[filippomc]

For consistency and flexibility, I'd move this to the deployment-configuration directory together with all other templates

[zsinnema]

I first thought the same but then I realized it's not a deployment template but a "generate" tiltfile template
this one is used during running cloudharness-deploy (the generate command) and not during a deployment
therefore I think the current location is the best