K1: Fix regression with callable references as last statements in lambda

^KT-55729 Fixed

compiler/testData/diagnostics/tests/inference/callableReferences/conversionLastStatementInLambda.fir.kt

@@ -0,0 +1,34 @@
+// SKIP_TXT
+// ISSUE: KT-55729
+
+fun main(b: Boolean) {
+    callWithLambda {
+        // The only relevant case for KT-55729, Unit conversion should work, but doesn't in K1 1.8.0
+        // For K2, it still doesn't work (see KT-55936)
+        ::<!UNRESOLVED_REFERENCE!>test1<!>
+    }
+
+    callWithLambda {
+        // Unit conversion should work (for K2 see KT-55936)
+        <!ARGUMENT_TYPE_MISMATCH!>if (b) ::test1 else ::test2<!>
+    }
+
+    callWithLambda {
+        // That hasn't been working ever in K1 nor K2
+        <!ARGUMENT_TYPE_MISMATCH!>if (b) {
+            ::test1
+        } else {
+            ::test2
+        }<!>
+    }
+
+    callWithLambda {
+        // That hasn't been working ever in K1 nor K2
+        (::<!UNRESOLVED_REFERENCE!>test1<!>)
+    }
+}
+
+fun test1(): String = ""
+fun test2(): String = ""
+
+fun callWithLambda(action: () -> () -> Unit) {}

compiler/testData/diagnostics/tests/inference/callableReferences/conversionLastStatementInLambda.kt

@@ -0,0 +1,34 @@
+// SKIP_TXT
+// ISSUE: KT-55729
+
+fun main(b: Boolean) {
+    callWithLambda {
+        // The only relevant case for KT-55729, Unit conversion should work, but doesn't in K1 1.8.0
+        // For K2, it still doesn't work (see KT-55936)
+        ::test1
+    }
+
+    callWithLambda {
+        // Unit conversion should work (for K2 see KT-55936)
+        if (b) ::test1 else ::test2
+    }
+
+    callWithLambda {
+        // That hasn't been working ever in K1 nor K2
+        if (b) <!TYPE_MISMATCH!>{
+            <!TYPE_MISMATCH!>::<!TYPE_MISMATCH!>test1<!><!>
+        }<!> else <!TYPE_MISMATCH!>{
+            <!TYPE_MISMATCH!>::<!TYPE_MISMATCH!>test2<!><!>
+        }<!>
+    }
+
+    callWithLambda {
+        // That hasn't been working ever in K1 nor K2
+        (<!TYPE_MISMATCH, TYPE_MISMATCH!>::<!TYPE_MISMATCH!>test1<!><!>)
+    }
+}
+
+fun test1(): String = ""
+fun test2(): String = ""
+
+fun callWithLambda(action: () -> () -> Unit) {}