feat: Add capability to register an embedded dataplane

[zub4t]

What this PR changes/adds

This PR contributes with an extension to enable an embedded data plane to be register using a configuration file without the need to do explicitly through an API

Why it does that

When doing unit tests and there is a necessity to register an embedded data plane, before it was necessary to do so through an API request, now it is possible to use configuration.

Linked Issue(s)

Closes #2226

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[jimmarino]

Thanks for the contribution. I have some serious concerns as this code appears to be a near copy of this code without attribution:

https://github.com/eclipse-tractusx/tractusx-edc/blob/main/edc-extensions/dataplane-selector-configuration/src/main/java/org/eclipse/tractusx/edc/dataplane/selector/configuration/DataPlaneSelectorConfigurationServiceExtension.java

We can't have that. Also:

1. The code style does not adhere to EDC guidelines
2. There is no documentation
3. The implementation can be simplified and clarified in places

My suggestion is to close this PR due to the issue of improper attribution, open a discussion, and let's work through how to approach the implementation from a clean slate.

[zub4t]

Ok, sure. Let's do it 😊

[zub4t]

Hi @jimmarino Thanks for your review 😊
Can you help me understand points 1 and 3 better? I'd like to improve my code for future PR

[jimmarino]

Please review the coding guidelines (including running checkstyle). For point 3, open a discussion with a technical proposal for how you want the registration process to work. I want to start from a clean slate, not the current code.

[zub4t]

Please review the coding guidelines (including running checkstyle). For point 3, open a discussion with a technical proposal for how you want the registration process to work. I want to start from a clean slate, not the current code.

Okay, thanks again, I'll do as you suggest