feat(apps): move user/pass/secrets/keys from env to secret (#1501)

* feat(apps): move user/pass/secrets/keys from `env` to `secret`

* uptimerobot-prometheus

* podgrab

* grafana

* nextcloud

* openldap, also fix some variable types

* healthchecks

* onlyoffice

* transmission

* fix variable type (stash)

* handbrake (also fix some variable types)

* jd2 (also fix some var  values

* whoops

* try this

* bump major

* fix calibre var type

* fix var types on 2 apps

* add placeholders on questions and set `private: true` on passwords/tokens/secrets

charts/stable/promcord/Chart.yaml

@@ -21,7 +21,7 @@ name: promcord
 sources:
   - https://github.com/nimarion/promcord
 type: application
-version: 1.0.8
+version: 2.0.0
 annotations:
   truecharts.org/catagories: |
     - metrics