feature: support for JUnit 5 combined annotations

[gtoison]

Adds support for JUnit5 combined annotation: https://junit.org/junit5/docs/current/user-guide/#writing-tests-meta-annotations

• When checking if a method is a test, look for combined annotations
• Look for annotations that are themselves annotated with TestTemplate to support ParameterizedTest
• Added sample classes covering the new cases

Fixes #276
Fixes #268

[apupier]

this is implemented fro IntelliJ only, right?
For Eclipse more work will need to be done or it is already supported?

EDIT: please forget about this comment, I read too fast.

[gtoison]

This should work for both plugins since the change is in the shared infinitest-lib module
I still need to find a practical way to test the plugins though