UI. Test framework. Set default to the existing one in project

[alisevych]

Description

Suggestion: Set default Test framework to the one existing in the project dependencies.

Expected behavior

If Maven/Gradle/IDEA project already has test automation framework configured - suggest it as default for test generation.
Other frameworks can be available to choose and install.
Several test runners in one project - it is a configuration issue that must be resolved. If we use the already installed runner we avoid this issue. Also thus we minimize changes to the user's project configuration.

Environment

IntelliJ IDEA
JUnit4, JUnit5, TestNG - possible frameworks for projects with JDK 9+
JUnit4, JUnit5 - for projects with JDK 8

Potential alternatives

Now the default test framework is JUnit5