feat(ids): allow two different hashing functions

[jlabeit]

What the PR Includes

• Needed for this PR: https://github.com/impargo/impargo-backend/pull/4112

Checklist

• Tests are added.
• Manual testing instructions are added.
• Configs are added/adapted if applicable.
• Issue is properly linked if applicable.

Manual Testing Instructions

1. Go to X.
2. Add Y.
3. Try Z.

Scenario 1:

4. Make sure A happens.

Scenario 2:

4. Make sure B happens.