rdar://100981691 Set spark.cleaner.periodicGC.interval to 20min

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

We used this in Spark 3.3 since 2022-10-17 (3.3.0.22-apple). This is a backport from Spark 3.3 to 3.2.
(cherry picked from commit fbd7496)

### Why are the changes needed?

This is used commonly in the production streaming job memory optimization.

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

No.

### How was this patch tested?

Pass the CIs.

core/src/main/scala/org/apache/spark/internal/config/package.scala

@@ -1649,7 +1649,7 @@ package object config {
     ConfigBuilder("spark.cleaner.periodicGC.interval")
       .version("1.6.0")
       .timeConf(TimeUnit.SECONDS)
-      .createWithDefaultString("30min")
+      .createWithDefaultString("20min")
 
   private[spark] val CLEANER_REFERENCE_TRACKING =
     ConfigBuilder("spark.cleaner.referenceTracking")