LL API: fix kt -> fir mapping for KtObjectLiteralExpression

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/element/builder/FirElementBuilder.kt

@@ -48,6 +48,7 @@ internal class FirElementBuilder {
                 // null will be return in case of invalid KtValueArgument
                 deparenthesized.getArgumentExpression()
             }
+            deparenthesized is KtObjectLiteralExpression -> deparenthesized.objectDeclaration
             else -> deparenthesized
         }
     }

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/expressions/objectLiteralExpression.kt

@@ -0,0 +1,3 @@
+// LOOK_UP_FOR_ELEMENT_OF_TYPE: org.jetbrains.kotlin.psi.KtObjectLiteralExpression
+
+val x = <expr>object : Any {}</expr>

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/expressions/objectLiteralExpression.txt

@@ -0,0 +1,10 @@
+KT element: KtObjectLiteralExpression
+FIR element: FirAnonymousObjectExpressionImpl
+
+FIR element rendered:
+object : R|kotlin/Any| {
+    private constructor(): R|<anonymous>| {
+        super<R|kotlin/Any|>()
+    }
+
+}

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/GetOrBuildFirTestGenerated.java

@@ -108,6 +108,17 @@ public class GetOrBuildFirTestGenerated extends AbstractGetOrBuildFirTest {
         }
     }
 
+    @Nested
+    @TestMetadata("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/expressions")
+    @TestDataPath("$PROJECT_ROOT")
+    public class Expressions {
+        @Test
+        @TestMetadata("objectLiteralExpression.kt")
+        public void testObjectLiteralExpression() throws Exception {
+            runTest("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/expressions/objectLiteralExpression.kt");
+        }
+    }
+
     @Nested
     @TestMetadata("idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/inImport")
     @TestDataPath("$PROJECT_ROOT")