Migrate Edc-Api-Request-Calls to Management Api Version 0.1.2

[efiege]

Feature Request

Description

We want to migrate to edc version 0.1.2. As a result the management-api calls must be adapted. The http GET methods to query edc objects have been replaced by POST methods.

Here is an example regarding the retrieval of assets:
Old request:
GET on /assets?offset=x&limit=y

New Request:
POST on /assets/request using the following json:

{
    "@context": {
        "edc": "https://w3id.org/edc/v0.0.1/ns/"
    },
    "@type": "QuerySpecDto",
    "offset": 0,
    "limit": 10
}

Like described in #364 "Creating new UI API Wrapper endpoints for each page and each request" is our best option.

Solution Proposal and Work Breakdown

• Use API Wrapper to fetch Assets on Asset-Page
• Use API Wrapper to fetch Polices on Policies-Page
• Use API Wrapper to fetch Contarct Definition on Contract Definitions-Page
• Use API Wrapper to fetch Transfer-Processes on Transfer History-Page
• Use API Wrapper to fetch Catalog for Catalog Browser-Page

[richardtreier]

redundant, since we will migrate calls to our UI API Wrapper