[FE 1.0] Keep the same type attributes during union or intersection type attributes

^KT-51317 Fixed

compiler/testData/diagnostics/tests/functionLiterals/kt51317.fir.kt

@@ -0,0 +1,11 @@
+val f: (String.() -> String)? = null
+
+fun box(): String {
+    val g = when {
+        f != null -> f
+        else -> {
+            { this + "K" }
+        }
+    }
+    return g("O")
+}

compiler/testData/diagnostics/tests/functionLiterals/kt51317.kt

@@ -0,0 +1,11 @@
+val f: (String.() -> String)? = null
+
+fun box(): String {
+    val g = when {
+        f != null -> <!DEBUG_INFO_SMARTCAST!>f<!>
+        else -> {
+            { this + "K" }
+        }
+    }
+    return g("O")
+}

compiler/testData/diagnostics/tests/functionLiterals/kt51317.txt

@@ -0,0 +1,4 @@
+package
+
+public val f: (kotlin.String.() -> kotlin.String)? = null
+public fun box(): kotlin.String