C#/Java: Add isRelevantSinkKind predicate with language specific implementation.

java/ql/src/utils/model-generator/internal/CaptureModels.qll

@@ -163,7 +163,7 @@ string captureSink(TargetApi api) {
     config.hasFlow(src, sink) and
     ExternalFlow::sinkNode(sink, kind) and
     api = src.getEnclosingCallable() and
-    not kind = "logging" and
+    isRelevantSinkKind(kind) and
     result = asSinkModel(api, asInputArgument(src), kind)
   )
 }

java/ql/src/utils/model-generator/internal/CaptureModelsSpecific.qll

@@ -61,6 +61,12 @@ string asInputArgument(DataFlow::Node source) {
   result = qualifierString()
 }
 
+/**
+ * Holds if `kind` is a relevant sink kind for creating sink models.
+ */
+bindingset[kind]
+predicate isRelevantSinkKind(string kind) { not kind = "logging" }
+
 module DataFlowImplCommon {
   predicate store = Dfic::store/4;