Make credentials loading consistent between KedroContext._get_catalog() and catalog CLI

[MigQ2]

Description

I found that credentials initialization is done differently in different cases:

• In KedroContext._get_catalog() the _get_config_credentials() method is used to grab credentials for the DataCatalog
• In catalog CLI's resolve_patterns(), it is done with context.config_loader.get("credentials", None) instead

Is there a good reason for this? If not, I think it's better to load the credentials in a consistent way and using the same methods everywhere

Why is this important?

I have a custom catalog class that extends KedroCatalog and overrides the _get_config_credentials() method because I get my credentials from a cloud secret management service instead of a local credentials.yml file.

This was making the command kedro catalog resolve fail because my credentials are not in the ConfigLoader

Checklist

• Read the contributing guidelines
• Signed off each commit with a Developer Certificate of Origin (DCO)
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes (I didn't add tests as I'm not adding new functionality and I believe this should be covered by existing tests)
• Checked if this change will affect Kedro-Viz, and if so, communicated that with the Viz team

[ElenaKhaustova]

Thank you, @MigQ2! This change makes sense to me. Could you please resolve the conflicts and I'll be able to approve the PR?

[MigQ2]

Hi @ElenaKhaustova, conflicts solved!

[ElenaKhaustova]

LGTM, thank you @MigQ2! ✨

[merelcht]

Thanks for the contribution @MigQ2 ! ⭐