[SPARK-30401][SQL] Call requireNonStaticConf() only once in set()

### What changes were proposed in this pull request?
Calls of `requireNonStaticConf()` are removed from the `set()` methods in RuntimeConfig because those methods invoke `def set(key: String, value: String): Unit` where `requireNonStaticConf()` is called as well.

### Why are the changes needed?
To avoid unnecessary calls of `requireNonStaticConf()`.

### Does this PR introduce any user-facing change?
No

### How was this patch tested?
By existing tests from `SQLConfSuite`

Closes #27062 from MaxGekk/call-requireNonStaticConf-once.

Authored-by: Maxim Gekk <max.gekk@gmail.com>
Signed-off-by: HyukjinKwon <gurwls223@apache.org>

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

@@ -47,7 +47,6 @@ class RuntimeConfig private[sql](sqlConf: SQLConf = new SQLConf) {
    * @since 2.0.0
    */
   def set(key: String, value: Boolean): Unit = {
-    requireNonStaticConf(key)
     set(key, value.toString)
   }
 
@@ -57,7 +56,6 @@ class RuntimeConfig private[sql](sqlConf: SQLConf = new SQLConf) {
    * @since 2.0.0
    */
   def set(key: String, value: Long): Unit = {
-    requireNonStaticConf(key)
     set(key, value.toString)
   }