Suggest postfix templates on lambda expressions

idea/testData/codeInsight/postfix/valAtLamba.kt

@@ -0,0 +1,3 @@
+fun foo() {
+    { y: Int -> "abc" }.val<caret>
+}

idea/testData/codeInsight/postfix/valAtLamba.kt.after

@@ -0,0 +1,3 @@
+fun foo() {
+    val function = { y: Int -> "abc" }
+}

idea/testData/codeInsight/postfix/valAtLambaArgumentInCall.kt

@@ -0,0 +1,5 @@
+// ALLOW_MULTIPLE_EXPRESSIONS
+fun bar(x: (Int) -> String) = x(1)
+fun foo() {
+    bar() { y: Int -> "abc" }.val<caret>
+}

idea/testData/codeInsight/postfix/valAtLambaArgumentInCall.kt.after

@@ -0,0 +1,5 @@
+// ALLOW_MULTIPLE_EXPRESSIONS
+fun bar(x: (Int) -> String) = x(1)
+fun foo() {
+    val bar = bar() { y: Int -> "abc" }
+}