Add tanka as a new way to deploy services

[alexissellier]

Tanka is a deployment tool for kubernetes created by grafana labs and could be integrated as a new section to deployments

Which solution do you suggest?

here is an example of a devspace.yaml

deployments:
  tanka:
     path: # path to tanka file
     env:   #environment to deploy
     vars: []  vars to pass to tag
     exttraConfgs:|  #extra config to add

Additional context

Parameters that could be added as optional : boolean to launch jsonnet bundler generate a custom variable by mentioning a apiEndpoint

/kind feature