Introduce Variable: Allow choosing extraction scope for expressions in the lambda body

#KT-7720 Fixed

compiler/frontend/src/org/jetbrains/kotlin/psi/psiUtil/ktPsiUtil.kt

@@ -421,4 +421,6 @@ public fun KtExpression.getOutermostParenthesizerOrThis(): KtExpression {
             else -> true
         }
     }?.first as KtExpression? ?: this
-}
+}
+
+public fun PsiElement.isFunctionalExpression(): Boolean = this is KtNamedFunction && nameIdentifier == null