[feature] KeyValue add delete node functionality

[pxp928]

Is your feature request related to a problem? Please describe.

Based on the new PR: https://github.com/guacsec/guac/pull/1982

ENT backend has been updated but the same changes need to be made for the keyvalue backend. Implementation of delete node (and relationships) for CertifyVuln, hasSBOM, and hasSLSA.

Describe the solution you'd like Implementation of delete node (and relationships) for CertifyVuln, hasSBOM, and hasSLSA for the keyvalue backend