Add EDA integration tests CDK Setup (EventBridge Consumer persistent solution)

[san99tiago]

To the existing EDA example, add the "Infrastructure" for the Testing part

[san99tiago]

Close Issue by adding this commit:

• 01aaa92

Important:

• This will enable the "integration tests CDK part", but the actual "code" to execute the int-tests is still required, which shuold be divided into two parts:
• The DynamoDB Table items are saved in the table with TTL, so that they are automatically destroyed after 12 hours (to clean the test data after the tests are executed).
  • Part 1: Make sure that the SOURCE code when running the "integration tests" knows to update the "source" of the generated event to be tests, instead of the real source (could be driven by an ENV-VAR, or similar...)
  • Part 2: Add the code for the "integration tests", to execute the SOURCE code + the validation of fetching the DynamoDB table (with retries if possible), to assert that the expected event is saved.