Check specificity relation for generant types of the constraint system.

Otherwise we can't properly chose between 'dynamic' and generic type.

compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/dynamicVsGeneric.kt

@@ -0,0 +1,9 @@
+object X1
+object X2
+
+class Inv<T>
+
+fun dynamic.foo() = X1
+fun <T> Inv<T>.foo() = X2
+
+fun test(): X2 = Inv<Any>().foo()

compiler/testData/diagnostics/testsWithJsStdLib/dynamicTypes/dynamicVsGeneric.txt

@@ -0,0 +1,26 @@
+package
+
+public fun test(): X2
+public fun </*0*/ T> Inv<T>.foo(): X2
+public fun dynamic.foo(): X1
+
+public final class Inv</*0*/ T> {
+    public constructor Inv</*0*/ T>()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object X1 {
+    private constructor X1()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object X2 {
+    private constructor X2()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}