new inference: provide diagnostics on failed inference (strict subtyping constraints); don't resolve vars before incorporate - this way captures won't be opened too early

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting8/IDEA57533.java

@@ -1,6 +1,6 @@
 class C<T extends C<? extends C<? extends T>>>{
     void foo(C<?> x){
-        <error descr="Inferred type 'capture<?>' for type parameter 'T' is not within its bound; should extend 'C<? extends capture<?>>'">bar(x)</error>;
+        bar<error descr="'bar(C<T>)' in 'C' cannot be applied to '(C<capture<?>>)'">(x)</error>;
     }
     <T extends C<? extends T>> void bar(C<T> x){}
 }