Run classifier usage checkers for ambiguous references when possible

See comment in getReferencedClassifier and importJavaSamInterface.kt for
explanation

compiler/testData/diagnostics/tests/deprecated/importJavaSamInterface.kt

@@ -0,0 +1,13 @@
+// SKIP_TXT
+// FILE: test/J.java
+
+package test;
+
+@Deprecated
+public interface J {
+    public String foo(int x);
+}
+
+// FILE: K.kt
+
+import test.<!DEPRECATION!>J<!>