[incubator-kie-drools-5920] [new-parser] Strict annotation parsing

[tkobayas]

• Skip the test for new parser

Issue:

• [new-parser] Strict annotation parsing #5920

[tkobayas]

LanguageLevelOption.DRL6_STRICT has 2 points:

1. Parser phase: Annotation should be placed at the beginning of the statement. e.g.

@Xyz rule yyy
when
  ...

2. Compiler phase: Annotation should be resolved as Java annotation (= custom annotation java class has to actually exist).

LanguageLevelOption.DRL6_STRICT is not written in document and I haven't seen users using it. Also implementing it would cause complexity which doesn't likely pay off (Old parser maintains 2 parser classes DRL6Parser and DRL6StrictParser). So I think we can skip the test at the moment, and we will discuss a deprecation plan in dev@kie.apache.org later. Of course, if there is a strong need, we will be able to implement it. WDYT? @mariofusco @yurloc @gitgabrio @baldimir