update LegacyFastDateFormatter instead of LegacySimpleDateFormatter

Author: SaurabhChawla100

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/CSVInferSchema.scala

@@ -24,9 +24,8 @@ import scala.util.control.Exception.allCatch
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.analysis.TypeCoercion
 import org.apache.spark.sql.catalyst.expressions.ExprUtils
-import org.apache.spark.sql.catalyst.util.{DateFormatter, TimestampFormatter}
+import org.apache.spark.sql.catalyst.util.{DateFormatter, LegacyFastDateFormatter, TimestampFormatter}
 import org.apache.spark.sql.catalyst.util.LegacyDateFormats.FAST_DATE_FORMAT
-import org.apache.spark.sql.catalyst.util.LegacySimpleDateFormatter
 import org.apache.spark.sql.errors.QueryExecutionErrors
 import org.apache.spark.sql.types._
 
@@ -175,7 +174,7 @@ class CSVInferSchema(val options: CSVOptions) extends Serializable {
 
   private def tryParseDateFormat(field: String): DataType = {
     if (options.inferDateType
-      && !dateFormatter.isInstanceOf[LegacySimpleDateFormatter]
+      && !dateFormatter.isInstanceOf[LegacyFastDateFormatter]
       && (allCatch opt dateFormatter.parse(field)).isDefined) {
       DateType
     } else {

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/json/JsonInferSchema.scala

@@ -134,7 +134,7 @@ private[sql] class JsonInferSchema(options: JSONOptions) extends Serializable {
         if (options.prefersDecimal && decimalTry.isDefined) {
           decimalTry.get
         } else if (options.inferDateType
-            && !dateFormatter.isInstanceOf[LegacySimpleDateFormatter] &&
+            && !dateFormatter.isInstanceOf[LegacyFastDateFormatter] &&
             (allCatch opt dateFormatter.parse(field)).isDefined) {
           DateType
         } else if (options.inferTimestamp &&