[Analysis API] add few tests which checks contracts of signature substitutions

analysis/analysis-api/testData/components/signatureSubstitution/signatureContracts/topLevel.kt

@@ -0,0 +1,13 @@
+fun <A> foo(): A {}
+
+fun <A> A.foo1() {}
+
+fun <A> foo2(a: A) {}
+
+fun <A, B: Number> foo3(a: A): Map<B, List<A>> {}
+
+fun <A, B: Collection<A>, C : A> foo4(a: A): B {}
+
+val <A> A.bar1: Int get() = 10
+
+val <A> A.bar2: List<A> get() = listOf(this)