[FIR] add missed diagnostics for incomplete code

^KT-55053

analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode/delegatedProperty.kt

@@ -0,0 +1 @@
+<expr>val p: String by</expr>

analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode/delegatedProperty.txt

@@ -0,0 +1,9 @@
+KT element: KtProperty
+FIR element: FirPropertyImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final val p: R|kotlin/String|by ERROR_EXPR(Should have delegate)
+    public get(): R|kotlin/String| {
+        ^ D|/p|.<Unresolved name: getValue>#(Null(null), ::R|/p|)
+    }

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/OutOfContentRootGetOrBuildFirTestGenerated.java

@@ -579,6 +579,12 @@ public class OutOfContentRootGetOrBuildFirTestGenerated extends AbstractOutOfCon
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode"), Pattern.compile("^(.+)\\.kt$"), null, true);
         }
 
+        @Test
+        @TestMetadata("delegatedProperty.kt")
+        public void testDelegatedProperty() throws Exception {
+            runTest("analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode/delegatedProperty.kt");
+        }
+
         @Test
         @TestMetadata("javaClassLiteral.kt")
         public void testJavaClassLiteral() throws Exception {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/SourceGetOrBuildFirTestGenerated.java

@@ -579,6 +579,12 @@ public class SourceGetOrBuildFirTestGenerated extends AbstractSourceGetOrBuildFi
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode"), Pattern.compile("^(.+)\\.kt$"), null, true);
         }
 
+        @Test
+        @TestMetadata("delegatedProperty.kt")
+        public void testDelegatedProperty() throws Exception {
+            runTest("analysis/low-level-api-fir/testdata/getOrBuildFir/invalidCode/delegatedProperty.kt");
+        }
+
         @Test
         @TestMetadata("javaClassLiteral.kt")
         public void testJavaClassLiteral() throws Exception {

compiler/fir/raw-fir/psi2fir/src/org/jetbrains/kotlin/fir/builder/RawFirBuilder.kt

@@ -1814,7 +1814,9 @@ open class RawFirBuilder(
                                 buildOrLazyExpression(expression.toFirSourceElement()) {
                                     expression.toFirExpression("Should have delegate")
                                 }
-                            } ?: buildErrorExpression { ConeSimpleDiagnostic("Should have delegate", DiagnosticKind.ExpressionExpected) }
+                            } ?: buildErrorExpression {
+                                diagnostic = ConeSimpleDiagnostic("Should have delegate", DiagnosticKind.ExpressionExpected)
+                            }
 
                             val delegateBuilder = FirWrappedDelegateExpressionBuilder().apply {
                                 val delegateExpression = extractDelegateExpression()