[SPARK-44131][SQL][FOLLOWUP] Revert the deprecation message

### What changes were proposed in this pull request?
Revert the deprecation message changes

### Why are the changes needed?
to address #41687 (comment)

### Does this PR introduce _any_ user-facing change?
yes

### How was this patch tested?
existing CI

Closes #41950 from zhengruifeng/sql_call_function_warning.

Authored-by: Ruifeng Zheng <ruifengz@apache.org>
Signed-off-by: Ruifeng Zheng <ruifengz@apache.org>

sql/core/src/main/scala/org/apache/spark/sql/functions.scala

@@ -8336,7 +8336,7 @@ object functions {
    * @since 1.5.0
    */
   @scala.annotation.varargs
-  @deprecated("Use call_function")
+  @deprecated("Use call_udf")
   def callUDF(udfName: String, cols: Column*): Column =
     call_function(udfName, cols: _*)
 
@@ -8356,7 +8356,6 @@ object functions {
    * @since 3.2.0
    */
   @scala.annotation.varargs
-  @deprecated("Use call_function")
   def call_udf(udfName: String, cols: Column*): Column =
     call_function(udfName, cols: _*)