Ignore resolution to function without arguments on LHS of '::'

In the expression "Runnable::run" we were resolving the left-hand side to the
SAM constructor of Runnable. Now we detect this situation, ignore the result of
such resolution, and continue resolving the LHS as a type

compiler/testData/diagnostics/tests/callableReference/sam.kt

@@ -0,0 +1,31 @@
+// FILE: test/GenericSam.java
+
+package test;
+
+public interface GenericSam<T> {
+    void invoke(T t);
+}
+
+// FILE: test.kt
+
+import test.GenericSam
+
+fun f1() = Runnable::class
+fun f2() = Runnable::run
+fun f3() = java.lang.Runnable::class
+fun f4() = java.lang.Runnable::run
+
+fun f5() = GenericSam::class
+fun f6() = GenericSam<*>::invoke
+fun f7() = test.GenericSam::class
+fun f8() = test.GenericSam<String>::invoke
+
+fun g1() = Runnable {}::class
+fun g2() = Runnable {}::run
+fun g3() = java.lang.Runnable {}::class
+fun g4() = java.lang.Runnable {}::run
+
+fun g5() = GenericSam<String> {}::class
+fun g6() = GenericSam<String> {}::invoke
+fun g7() = test.GenericSam<String> {}::class
+fun g8() = test.GenericSam<String> {}::invoke