[SPARK-48185][SQL] Fix 'symbolic reference class is not accessible: class sun.util.calendar.ZoneInfo'
### What changes were proposed in this pull request?
I met the error below while debugging UTs because of loading `sun.util.calendar.ZoneInfo` eagerly. This PR makes the relevant variables lazy.
```log
Caused by: java.lang.IllegalAccessException: symbolic reference class is not accessible: class sun.util.calendar.ZoneInfo, from interface org.apache.spark.sql.catalyst.util.SparkDateTimeUtils (unnamed module 65d6b83b)
at java.base/java.lang.invoke.MemberName.makeAccessException(MemberName.java:955)
at java.base/java.lang.invoke.MethodHandles$Lookup.checkSymbolicClass(MethodHandles.java:3686)
at java.base/java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:3646)
at java.base/java.lang.invoke.MethodHandles$Lookup.findVirtual(MethodHandles.java:2680)
at org.apache.spark.sql.catalyst.util.SparkDateTimeUtils.$init$(SparkDateTimeUtils.scala:206)
at org.apache.spark.sql.catalyst.util.DateTimeUtils$.<clinit>(DateTimeUtils.scala:41)
... 82 more
```
### Why are the changes needed?
sun.util.calendar.ZoneInfo is inaccessible in some scenarios.
### Does this PR introduce _any_ user-facing change?
Yes, such errors might be delayed from backend-scheduling to job-scheduling
### How was this patch tested?
I tested with idea and UT debugging locally
### Was this patch authored or co-authored using generative AI tooling?
no
Closes #46457 from yaooqinn/SPARK-48185.
Authored-by: Kent Yao <yao@apache.org>
Signed-off-by: Kent Yao <yao@apache.org>
diff --git a/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkDateTimeUtils.scala b/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkDateTimeUtils.scala
index 8db8c3c..0447d81 100644
--- a/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkDateTimeUtils.scala
+++ b/sql/api/src/main/scala/org/apache/spark/sql/catalyst/util/SparkDateTimeUtils.scala
@@ -198,7 +198,7 @@
}
private val zoneInfoClassName = "sun.util.calendar.ZoneInfo"
- private val getOffsetsByWallHandle = {
+ private lazy val getOffsetsByWallHandle = {
val lookup = MethodHandles.lookup()
val classType = SparkClassUtils.classForName(zoneInfoClassName)
val methodName = "getOffsetsByWall"
