GD-155: Add more Analyzers to GdUnit4 to prevent wrong usage of the API

[MikeSchulze]

Is your feature request related to a problem? Please describe.
With the new introduced, gdUnit4.analyzer we are now in position to add more compile validations.

• add TestCase:TestName naming validation, a test case name should be unique.

    [TestCase(TestName = "A")]
    [TestCase(TestName = "A")]
    public void Example() => AssertThat(true).IsEqual(true);

Will actual fail at runtime:

Additional context
gdUnit4.analyzer