Use Data Source ID only to check for rule type references

[JAORMX]

Summary

The project ID belongs to the rule type, so we only check for the data
source ID when checking for references before attempting to delete. This
should be fairly safe as we have already checked the project ID
beforehand.

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 55.222% (-0.004%) from 55.226%
when pulling 08d3ef5 on JAORMX:ds-func-proj
into c7e8d6d on mindersec:main.

[rdimitrov]

Ah, now I realise why this was wrong 🤦‍♂️ Thanks for fixing it! 🚀