Raise a proper SyntaxError for pattern matching until implemented

* The untagged spec is legitimately passing due to Prism returning the correct SyntaxError for it.

Author: eregon

spec/tags/language/pattern_matching_tags.txt

@@ -1,7 +1,6 @@
 fails:Pattern matching variable pattern supports using any name with _ at the beginning in a pattern several times
 fails:Pattern matching variable pattern supports existing variables in a pattern specified with ^ operator
 fails:Pattern matching variable pattern allows applying ^ operator to bound variables
-fails:Pattern matching variable pattern requires bound variable to be specified in a pattern before ^ operator when it relies on a bound variable
 fails:Pattern matching alternative pattern matches if any of patterns matches
 fails:Pattern matching alternative pattern does not support variable binding
 fails:Pattern matching alternative pattern support underscore prefixed variables in alternation

src/main/java/org/truffleruby/parser/YARPTranslator.java

@@ -959,7 +959,9 @@ public RubyNode visitCapturePatternNode(Nodes.CapturePatternNode node) {
 
     @Override
     public RubyNode visitCaseMatchNode(Nodes.CaseMatchNode node) {
-        return super.visitCaseMatchNode(node);
+        var context = RubyLanguage.getCurrentContext();
+        throw new RaiseException(context, context.getCoreExceptions()
+                .syntaxError("`case/in` pattern matching not yet implemented", currentNode, getSourceSection(node)));
     }
 
     @Override
@@ -2564,7 +2566,9 @@ public RubyNode visitMatchPredicateNode(Nodes.MatchPredicateNode node) {
 
     @Override
     public RubyNode visitMatchRequiredNode(Nodes.MatchRequiredNode node) {
-        return defaultVisit(node);
+        var context = RubyLanguage.getCurrentContext();
+        throw new RaiseException(context, context.getCoreExceptions()
+                .syntaxError("`=>` pattern matching not yet implemented", currentNode, getSourceSection(node)));
     }
 
     // See BodyTranslator#visitMatch2Node