fix(values): consistent usage of postgresql.adminPasswordKey

[muja]

Description of the change

Consistently use adminPasswordKey. Overriding this value currently leads to buggy behavior because it is not consistently used everywhere. Specifically the hard-coded postgres-password in one of the extraEnvVars is causing issues and downstream values files cannot override that easily.

Additional Information

Since janus-idp.postgresql.secretName is not used anymore, could be considered to delete it, but it might break downstream charts which use that helper.

Checklist

• Chart version bumped in Chart.yaml according to semver.
• Variables are documented in the values.yaml and added to the README.md. The pre-commit utility can be used to generate the necessary content. Use pre-commit run -a to apply changes.
• JSON Schema template updated and re-generated the raw schema via pre-commit hook.
• List tests pass for Chart using the Chart Testing tool and the ct lint command.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud