Extract common logic for annotation entries collection

Before this change annotation entries starting with '@' within expressions hadn't been resolved

Note that order of annotation entries in result may change according to order of children in PSI (see changed testData)

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -639,6 +639,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("atAnnotationResolve.kt")
+            public void testAtAnnotationResolve() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/annotations/atAnnotationResolve.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("BasicAnnotations.kt")
             public void testBasicAnnotations() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/annotations/BasicAnnotations.kt");