[FIR] Source for property delegates should not be null

^KT-60327 fixed


Merge-request: KT-MR-13221
Merged-by: Egor Kulikov <Egor.Kulikov@jetbrains.com>

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/incompletePropertyWithDelegate.kt

@@ -0,0 +1,4 @@
+import kotlin.reflect.KProperty
+
+fun String.getValue(x: Any?, y: KProperty<*>) = ""
+val x: String by

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/incompletePropertyWithDelegate.lazyBodies.txt

@@ -0,0 +1,4 @@
+FILE: incompletePropertyWithDelegate.kt
+    public? final? fun String.getValue(x: Any?, y: KProperty<*>): <implicit> { LAZY_BLOCK }
+    public? final? val x: Stringby LAZY_EXPRESSION
+        public? get(): <implicit> { LAZY_BLOCK }

compiler/fir/raw-fir/psi2fir/testData/rawBuilder/declarations/incompletePropertyWithDelegate.txt

@@ -0,0 +1,8 @@
+FILE: incompletePropertyWithDelegate.kt
+    public? final? fun String.getValue(x: Any?, y: KProperty<*>): <implicit> {
+        ^getValue String()
+    }
+    public? final? val x: Stringby ERROR_EXPR(Should have delegate)
+        public? get(): <implicit> {
+            ^ D|/x|.getValue#(Null(null), ::R|/x|)
+        }