Support JUnit Jupiter MethodSource calls in Call Hierarchy ViewPart

### Scenario
GIVEN I have a JUnit 5 test that uses a `MethodSource` for parameterization
GIVEN this calls method `x` for method `foo`

```
@ParameterizedTest
@MethodSource("x")
void foo() {
```

WHEN I select method `x` in the Java editor and then call "Open Call Hierarchy"
THEN method 'foo' should be displayed as a caller (in 2025-03, it's not)