fix(AasService) return Result schema for not 2XX responses

[gomezbc]

Description

This PR fixes DTR service not 2XX responses.

In the AAS spec definition, if a request is not succesful (not 2XX), the service is spected to return a message containing details about the failure.
An error should only be raised if it's network related

In our current implementation instead of returning this meesage, we raise an error if the DTR response is not 2XX, returning an 500 status code instead of the DTR message.

As our service doesn't implement any business logic to handle the requests, it should resturn the response instead of a misleading 500 response.

This PR fixes the issue returning that message.

@mgarciaLKS PR #55 might need some adjustment to implement this fix

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[matbmoser]

LGTM