[regression](case) fix bad base (#38084)

## Proposed changes

replace hardcode s3 properties
<!--Describe your changes.-->

---------

Co-authored-by: stephen <hello-stephen@qq.com>

regression-test/framework/src/main/groovy/org/apache/doris/regression/suite/Suite.groovy

@@ -752,6 +752,11 @@ class Suite implements GroovyInterceptable {
         return (enableBrokerLoad != null && enableBrokerLoad.equals("true"));
     }
 
+    String getS3Provider() {
+        String s3Provider = context.config.otherConfigs.get("s3Provider");
+        return s3Provider
+    }
+
     String getS3Region() {
         String s3Region = context.config.otherConfigs.get("s3Region");
         return s3Region

regression-test/suites/load_p0/broker_load/test_s3_load_with_load_parallelism.groovy

@@ -80,10 +80,6 @@ suite("test_s3_load_with_load_parallelism", "load_p0") {
            )
             ${prop}
             """
-     //   "AWS_ENDPOINT" = "cos.ap-beijing.myqcloud.com",
-    //   "AWS_ACCESS_KEY" = "AKIDd9RVMzIOI0V7Wlnbr9JG0WrhJk28zc2H",
-    //   "AWS_SECRET_KEY"="4uWxMhqnW3Plz97sPjqlSUXO1RhokRuO",
-    //   "AWS_REGION" = "ap-beijing"
 
         def max_try_milli_secs = 600000
         while (max_try_milli_secs > 0) {