Acceptance Test creation and refactoring

Refactor the test code based on the Issue: https://gitlab.opengroup.org/osdu/pmc/community-implementation/-/issues/81

Description:

ADR: osdu/platform/ci-cd-pipelines#49

• Move those launchers back to the core, making the core module self-sufficient.
• Made core test classes final forbidding overrides.
• Decouple provider modules from a core-test module. (By moving the refactored module to a new folder)
• Added a common, standards-based configuration for token issuing. (OIDC and direct token injection)
• Added a Readme file with the description of required variables to run tests.
• Added new acceptance job.