Is your feature request related to a problem? Please describe.
From kubernetes version 1.30 it is possible to query crds by predefined selectable fields in the spec see kubernetes/enhancements#4359 so it would be nice if external-secrets provide this feature to be able to query secrets based on spec fields like:

spec.dataFrom.extract.key or spec.data.remoteRef.key

In this way it is easier for admins to search by remote secrets and create integrations.

Describe the solution you'd like
Add selectableFields to the CRDs.

Additional context
i'm working on an integration with ESO and right now i have to look for all the external secrets in the cluster and then go through all of the searching by these fields.