[Fixes] Fix deployment error with flexible server configurations

[JPEasier]

Description

After creating the databases, firewall rules are created. These must be deployed before configurations can be created, otherwise a deployment error may occur. Failed Pipeline
See also: https://learn.microsoft.com/en-us/answers/questions/1078895/deploying-postgresql-flexible-server-with-azureext.html

Solution:

Add dependsOn to the sub resources

Pipeline references

Pipeline

Type of Change

• Bugfix (non-breaking change which fixes an issue)

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code