Update the EDC MVP sequence diagram

Its crucial for the technical data space teams to understand the basic flow of an Minimal Viable Dataspace. The following diagram is very helpful to understand the basics of the EDC: https://raw.githubusercontent.com/eclipse-dataspaceconnector/DataSpaceConnector/main/docs/diagrams/mvp.png need to also to update the [original UML diagram](https://raw.githubusercontent.com/eclipse-dataspaceconnector/DataSpaceConnector/main/docs/diagrams/mvp.puml)

Need to be aligned with the DID documentation: https://raw.githubusercontent.com/eclipse-dataspaceconnector/Publications/main/Identity%20Management/images/did-edc.png

Need to be aligned into Data Flows (need to be updated as well) : https://github.com/eclipse-dataspaceconnector/DataSpaceConnector/tree/main/docs/diagrams/data-flow

Need to be aligned with the EDC Contract flow: https://github.com/eclipse-dataspaceconnector/DataSpaceConnector/blob/main/docs/architecture/contracts.md

Should be included into the EDC architecture documentation: https://github.com/eclipse-dataspaceconnector/DataSpaceConnector/blob/main/docs/README.md