Support for mariadb and redis password autogeneration

[dlen]

Redis and Mariadb dependency charts both support password autogeneration so it would be nice to rely on such mechanism for this chart.

It will also require passbolt to detect such secrets and automatically inject them in the corresponding environment variables:

DATASOURCES_DEFAULT_PASSWORD
CACHE_CAKE_DEFAULT_PASSWORD

[plusiv]

Both of them have a mechanism to specify external secrets with those values, creating a unique secret from Passbolt chart with all those credentials and passing to Redis and Mariadb charts as an external secret would be a suitable option as well. 🤔🤔

[xskrasek]

This would be a neat future, as it could help simplify password management during deployment.