[SPARK-29554][SQL][FOLLOWUP] Rename Version to SparkVersion

### What changes were proposed in this pull request?

This is a follow-up of #26209 .
This renames class `Version` to class `SparkVersion`.

### Why are the changes needed?

According to the review comment, this uses more specific class name.

### Does this PR introduce any user-facing change?

No.

### How was this patch tested?

Pass the Jenkins with the existing tests.

Closes #26647 from dongjoon-hyun/SPARK-29554.

Authored-by: Dongjoon Hyun <dhyun@apple.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/FunctionRegistry.scala

@@ -490,7 +490,7 @@ object FunctionRegistry {
     expression[CurrentDatabase]("current_database"),
     expression[CallMethodViaReflection]("reflect"),
     expression[CallMethodViaReflection]("java_method"),
-    expression[Version]("version"),
+    expression[SparkVersion]("version"),
     expression[TypeOf]("typeof"),
 
     // grouping sets

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala

@@ -169,7 +169,7 @@ case class Uuid(randomSeed: Option[Long] = None) extends LeafExpression with Sta
   usage = """_FUNC_() - Returns the Spark version. The string contains 2 fields, the first being a release version and the second being a git revision.""",
   since = "3.0.0")
 // scalastyle:on line.size.limit
-case class Version() extends LeafExpression with CodegenFallback {
+case class SparkVersion() extends LeafExpression with CodegenFallback {
   override def nullable: Boolean = false
   override def foldable: Boolean = true
   override def dataType: DataType = StringType