fix(性能测试): 修复性能测试分割csv时重复分割的问题

--bug=1011088 --user=刘瑞斌 【性能测试】github#11235，性能测试：脚本使用CSV分割多节点压测异常,每个节点目前都会从头开始重复取值CSV中的数据,通过数据库错误日志查看，确认同一值被重复多次调用 https://www.tapd.cn/55049933/s/1117039

Closes #11235

backend/src/main/java/io/metersphere/performance/engine/EngineContext.java

@@ -15,6 +15,7 @@ public class EngineContext {
     private double[] ratios;
     private Map<String, Object> properties = new HashMap<>();
     private Map<String, byte[]> testResourceFiles = new HashMap<>();
+    private Map<String, Boolean> splitFlag = new HashMap<>();
 
     public String getTestId() {
         return testId;
@@ -108,4 +109,12 @@ public class EngineContext {
     public void setTestResourceFiles(Map<String, byte[]> testResourceFiles) {
         this.testResourceFiles = testResourceFiles;
     }
+
+    public Map<String, Boolean> getSplitFlag() {
+        return splitFlag;
+    }
+
+    public void setSplitFlag(Map<String, Boolean> splitFlag) {
+        this.splitFlag = splitFlag;
+    }
 }

backend/src/main/java/io/metersphere/performance/parse/xml/reader/JmeterDocumentParser.java

@@ -236,13 +236,17 @@ public class JmeterDocumentParser implements EngineSourceParser {
     }
 
     private void splitCsvFile(Node item) {
+        String filename = item.getText();
+        // 已经分割过的不再二次分割
+        if (BooleanUtils.toBoolean(context.getSplitFlag().get(filename))) {
+            return;
+        }
         Object csvConfig = context.getProperty("csvConfig");
         if (csvConfig == null) {
             return;
         }
         double[] ratios = context.getRatios();
         int resourceIndex = context.getResourceIndex();
-        String filename = item.getText();
         byte[] content = context.getTestResourceFiles().get(filename);
         if (content == null) {
             return;
@@ -298,6 +302,7 @@ public class JmeterDocumentParser implements EngineSourceParser {
         }
         // 替换文件
         context.getTestResourceFiles().put(filename, csv.toString().getBytes(StandardCharsets.UTF_8));
+        context.getSplitFlag().put(filename, true);
     }
 
     private void processResponseAssertion(Element element) {