published jars contain test dependencies

[ndr-brt]

WHAT

Looking at a fat jar like edc-controlplane-postgresql-azure-vault, it contain edc.junit artifact and its dependencies, like testcontainers, this is caused by the fact that some of our extensions are declaring edc.junit as an api/implementation dependency instead of the correct testImplementation.
This is causing the jar artifact to be around 78MB instead of 50MB.

WHY

// outlines the motivation, why the feature is desired, and possibly what the impact is if the feature is not
implemented. "Because we need it" is not a sufficient reason!

HOW

// if possible, outlines a solution proposal

FURTHER NOTES

// anything else you want to outline

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