KT-50728 Enforce receiver type resolve

When stdlib is represented as a source dependency (which seems to be the
case in the `kotlin` project), it will be resolved lazily for the IDE.
Same thing can happen if someone decides to "extend" the stdlib
by declaring their declaration in the `kotlin` package

In both of those cases, we need to make sure that receiver type is fully
resolved before trying to get a `coneType` from it

N.B. To make resolve tests work, I've added a separate folder
`withAllowedKotlinPackage` to the `testData`, because in the default
test setup it is not allowed to extend the `kotlin` package by user's
definitions

^KT-50728 Fixed

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerFirTestdataTestGenerated.java

@@ -4073,6 +4073,22 @@ public class DiagnosisCompilerFirTestdataTestGenerated extends AbstractDiagnosis
                 runTest("compiler/fir/analysis-tests/testData/resolve/visibility/visibilityWithOverrides.kt");
             }
         }
+
+        @Nested
+        @TestMetadata("compiler/fir/analysis-tests/testData/resolve/withAllowedKotlinPackage")
+        @TestDataPath("$PROJECT_ROOT")
+        public class WithAllowedKotlinPackage {
+            @Test
+            public void testAllFilesPresentInWithAllowedKotlinPackage() throws Exception {
+                KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/fir/analysis-tests/testData/resolve/withAllowedKotlinPackage"), Pattern.compile("^([^.]+)\\.kt$"), null, true);
+            }
+
+            @Test
+            @TestMetadata("extensionFunctionAddedToStdlib.kt")
+            public void testExtensionFunctionAddedToStdlib() throws Exception {
+                runTest("compiler/fir/analysis-tests/testData/resolve/withAllowedKotlinPackage/extensionFunctionAddedToStdlib.kt");
+            }
+        }
     }
 
     @Nested