feat: use password policy app to generate password for provisioned users

[DeepDiver1975]

Description

Generate password via password policy app if this app is enabled.

Related Issue

• Fixes https://github.com/owncloud/openidconnect/issues/270

Motivation and Context

How Has This Been Tested?

• test environment:
• test case 1:
• test case 2:
• ...

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests

Checklist:

• [ ] Code changes
• [ ] Unit tests added
• [ ] Acceptance tests added
• [ ] Documentation ticket raised:

Open tasks:

• [ ] ...

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

0.0% Coverage
0.0% Duplication

[mmattel]

Do we need any doc changes for this? If yes where and what?

[DeepDiver1975]

Do we need any doc changes for this?

No - just a plain bugfix. THX