Initialize builder inference lambda anyway, even a call is inapplicable

^KT-47744 Fixed

compiler/testData/codegen/box/inference/builderInference/kt47744.kt

@@ -0,0 +1,38 @@
+// !LANGUAGE: +UnrestrictedBuilderInference
+// WITH_RUNTIME
+// DONT_TARGET_EXACT_BACKEND: WASM
+
+import kotlin.experimental.ExperimentalTypeInference
+
+@OptIn(ExperimentalTypeInference::class)
+fun <T> flow(@BuilderInference block: suspend FlowCollector<T>.() -> Unit) = Flow<T>()
+
+@OptIn(ExperimentalTypeInference::class)
+fun <E> produce(@BuilderInference block: suspend SendChannel<E>.() -> Unit) {}
+
+interface SendChannel<in E> {
+    val onSend: SelectClause2<E, SendChannel<E>>
+}
+
+interface SelectClause2<in P, out Q>
+class Flow<out T>
+interface FlowCollector<in T>
+
+interface SelectBuilder<in R> {
+    operator fun <P, Q> SelectClause2<P, Q>.invoke(param: P, block: suspend (Q) -> R)
+}
+
+inline fun <R> select(crossinline builder: SelectBuilder<R>.() -> Unit) = Unit as R
+
+fun box(): String {
+    val x: Flow<String> = flow {
+        produce {
+            select<Unit> {
+                onSend("") {
+
+                }
+            }
+        }
+    }
+    return "OK"
+}