KT-6534 Code completion of global function does not insert import in very specific context

#KT-6534 Fixed

idea/testData/completion/handlers/multifile/GlobalFunctionImportInLambda-1.kt

@@ -0,0 +1,9 @@
+object XXX {
+    fun authorize(handler: String.() -> Unit) { }
+}
+
+fun f() {
+    XXX.authorize {
+        globalFun<caret>
+    }
+}

idea/testData/completion/handlers/multifile/GlobalFunctionImportInLambda-2.kt

@@ -0,0 +1,3 @@
+package ppp
+
+fun globalFun(){}

idea/testData/completion/handlers/multifile/GlobalFunctionImportInLambda.kt.after

@@ -0,0 +1,11 @@
+import ppp.globalFun
+
+object XXX {
+    fun authorize(handler: String.() -> Unit) { }
+}
+
+fun f() {
+    XXX.authorize {
+        globalFun()<caret>
+    }
+}