[HUDI-3995] Making perf optimizations for bulk insert row writer path (#5462)

- Avoid using udf for key generator for SimpleKeyGen and NonPartitionedKeyGen.
- Fixed NonPartitioned Key generator to directly fetch record key from row rather than involving GenericRecord.
- Other minor fixes around using static values instead of looking up hashmap.

hudi-spark-datasource/hudi-spark-common/src/main/scala/org/apache/hudi/HoodieSparkSqlWriter.scala

@@ -564,8 +564,7 @@ object HoodieSparkSqlWriter {
       throw new HoodieException("Bulk insert using row writer is not supported with current Spark version."
         + " To use row writer please switch to spark 2 or spark 3")
     }
-    val hoodieConfig = HoodieWriterUtils.convertMapToHoodieConfig(params)
-    val syncHiveSuccess = metaSync(sqlContext.sparkSession, hoodieConfig, basePath, df.schema)
+    val syncHiveSuccess = metaSync(sqlContext.sparkSession, writeConfig, basePath, df.schema)
     (syncHiveSuccess, common.util.Option.ofNullable(instantTime))
   }