Hardcoded `participantContextId` in `tck-extension`

[ndr-brt]

Bug Report

Describe the Bug

tck-extension hardcodes the Participant Context Id:

Connector/system-tests/protocol-tck/tck-extension/src/main/java/org/eclipse/edc/tck/dsp/data/DataAssembly.java

Line 53 in bb00825

public static final String PARTICIPANT_CONTEXT_ID = "participantContextId";

This means that the test suites that use tck-extension are forced to use a participantContextId context.

Expected Behavior

To be configurable, or to fallback to the single one eventually configured

[github-actions]

This issue is stale because it has been open for 14 days with no activity.