Simple auth formatting

[AdamNuclear]

Issue: Various projects are consuming secrets in a specific format
Example: htpasswd in secret - any webserver is expecting:

apiVersion: v1
data:
  users: <b64 encoded key:value  list of users>

decoded b64:

user:htpassword

Would be good to have formatting options like:

kind: VaultStaticSecret
metadata:
  name: vault-kv-app
  namespace: app
spec:
  format: <string> | default (json) json/yaml/kv
  destination_key_name: <string> | default: data

optionally would be also great to have the possibility to select just keys from kv:

spec:
 keys:
 - 1secretkey
 - 2secretkey

This would make the secrets operator way more compatible with all the software around without rewriting/modifying other projects.

[adrianmoisey]

Would this issue be solved by #437 ?

[AdamNuclear]

yea that would definitely solve it!

[benashz]

Closed with #437