[Bugfix] [Connector-V2] Fix SourceCommonOptions Parallelism Not Working with Spark Engine (apache#9302)

This bug was caused by EnvCommonOptions overriding SourceCommonOptions when setting the parallelism in the sparkRuntimeEnvironment.

Author: joexjx

seatunnel-core/seatunnel-spark-starter/seatunnel-spark-starter-common/src/main/java/org/apache/seatunnel/core/starter/spark/execution/SourceExecuteProcessor.java

@@ -92,12 +92,12 @@ public List<DatasetTableInfo> execute(List<DatasetTableInfo> upstreamDataStreams
                                         EnvCommonOptions.PARALLELISM.key(),
                                         EnvCommonOptions.PARALLELISM.defaultValue());
             }
+            envOption.put(EnvCommonOptions.PARALLELISM.key(), String.valueOf(parallelism));
             Dataset<Row> dataset =
                     sparkRuntimeEnvironment
                             .getSparkSession()
                             .read()
                             .format(SeaTunnelSource.class.getSimpleName())
-                            .option(EnvCommonOptions.PARALLELISM.key(), parallelism)
                             .option(
                                     Constants.SOURCE_SERIALIZATION,
                                     SerializationUtils.objectToString(source))