fix: replace deprecated bitnami charts, set equivalent debian postgres image

[SystemsPurge]

Quick replacement for the postgres and rabbitmq charts

[iripiri]

Hi @SystemsPurge thanks for fixing this!
When I tested, the controller and web-backend were not running because two secret key references needed changes:

chart/charts/villas/templates/web-backend-deployment.yaml

Line 54 in 497138e

key: password

fix: from password to postgres-password

chart/charts/villas/templates/web-backend-deployment.yaml

Line 63 in 497138e

key: rabbitmq-password

fix: from rabbitmq-password to password

And the same here:

chart/charts/villas/templates/controller-deployment.yaml

Line 49 in 497138e

key: rabbitmq-password