Importing Execution results via API is duplicating tests

Description
When importing JUnit results via the standard endpoint (/api/v2/import/execution/), if we encounter a Generic test with an identical definition to the test provided in the XML, we're not currently performing a verification. This results in the creation of a new test instead.

If we pass the Issue_key as a property this will have the normal behavior of adding the passed test key to the created test execution.

Pre-conditions

• Have an API Key setup;
• Have a JUnit XML Results file

How to reproduce
1) Send a POST request to the Junit endpoint with the XML file in the body https://xray.cloud.getxray.app/api/v2/import/execution/junit?projectKey=PROJECTKEY

2) Send the same POST request with the same XML file

Actual result/Attachments

The first request will create a test based on the XML definition, along with a new test execution, and subsequently link the created test to it.
The second request will produce another new test, also with the same definition, along with a new test execution, and link the newly created test to it.

Expected result

The first request creates a new test with the provided definition and includes it in the execution. Subsequently, the second request generates a new execution and includes the test created in the first request.