Allow use contract function by FQN. #KT-29772 fixed

compiler/testData/diagnostics/testsWithStdLib/contracts/dsl/fqnContractFunction.kt

@@ -0,0 +1,20 @@
+// !LANGUAGE: +AllowContractsForCustomFunctions +UseReturnsEffect
+// !USE_EXPERIMENTAL: kotlin.contracts.ExperimentalContracts
+// !DIAGNOSTICS: -INVISIBLE_REFERENCE -INVISIBLE_MEMBER
+
+import kotlin.contracts.InvocationKind
+
+inline fun foo(block: () -> Unit) {
+    kotlin.contracts.contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    block()
+}
+
+fun main() {
+    val x: Int
+    foo {
+        x = 42
+    }
+    println(x)
+}

compiler/testData/diagnostics/testsWithStdLib/contracts/dsl/fqnContractFunction.txt

@@ -0,0 +1,6 @@
+package
+
+public inline fun foo(/*0*/ block: () -> kotlin.Unit): kotlin.Unit
+    CallsInPlace(block, EXACTLY_ONCE)
+
+public fun main(): kotlin.Unit