[json] IJPL-172038 More performance improvements for json schema FUS

- Prefer HashMap and HashSet over the Linked* collections to reduce overhead
- Prefer strict enum type in a map
- Run several test attempts to achieve more stable results


(cherry picked from commit 8254f2317efc10450adb40168f8159120aa87915)

IJ-CR-149952

GitOrigin-RevId: f8fde91b390057faa64ff4e8b40f9db67f9ac36e

json/src/com/jetbrains/jsonSchema/fus/JsonSchemaHighlightingSessionStatisticsCollector.kt

@@ -39,7 +39,7 @@ internal class JsonSchemaHighlightingSessionStatisticsCollector {
     }
   }
 
-  fun reportSchemaUsageFeature(featureKind: JsonSchemaFusFeature) {
+  fun reportSchemaUsageFeature(featureKind: JsonSchemaFusCountedFeature) {
     val currentSession = getCurrentSession() ?: return
     currentSession.featuresWithCount[featureKind] = currentSession.featuresWithCount.getOrDefault(featureKind, 0) + 1
   }

json/tests/test/com/jetbrains/jsonSchema/JsonSchemaPerformanceTest.java

@@ -52,7 +52,7 @@ public class JsonSchemaPerformanceTest extends JsonSchemaHeavyAbstractTest {
       registerJsonSchema(myFixture, schemaText, "json", it -> true);
       myFixture.configureByFile("/azure-file.json");
       myFixture.checkHighlighting(true, false, true);
-    }).start();
+    }).attempts(5).start();
   }
 
   public void testSwaggerHighlighting() {