feat(comp.backend): Enable filtering for component instance without support group or service

[lolaapenna]

Task Description
We need to have a design session to decide the following:

• how to identify non-values
• the pattern for non-existing - we can consider naming the list of component instances in this category (no service, no support group)

Acceptance Criteria:

• ADR is discussed and there is a agreement to a solution
• Filtering option is implemented according to the ADR

Expected Test:
Database-Layer, APP-Layer and E2E Test.

[MR2011]

Having no service is not possible in the database:
https://github.com/cloudoperators/heureka/blob/main/internal/database/mariadb/init/schema.sql#L105

[lolaapenna]

Create an ADR considering the options.

[lolaapenna]

@dustindemmerle, could you kindly fill in the issue's Acceptance criteria and Expected Test sections?

[dustindemmerle]

ADR for Identification of Component Instances without support group or service:
https://codi.eu-nl-1.cloud.sap/DAyEAcAqQIS765JZyw0lYw?view

[lolaapenna]

Decision has been made, we just need to update the ADR.