[SPARK-40406][CORE] Change default logging to stderr to consistent with the behavior of log4j1

[LuciferYang]

What changes were proposed in this pull request?

As @Kimahriman mentioned, the default logging now goes to stdout instead of stderr, so this pr change it back to stderr.

Why are the changes needed?

Keep consistent with the behavior of log4j1.

Ref to

spark/core/src/main/resources/org/apache/spark/log4j-defaults.properties

Lines 18 to 23 in 78a5825

	# Set everything to be logged to the console
	log4j.rootCategory=INFO, console
	log4j.appender.console=org.apache.log4j.ConsoleAppender
	log4j.appender.console.target=System.err
	log4j.appender.console.layout=org.apache.log4j.PatternLayout
	log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n

and the log4j2.properties.template also points to SYSTEM_ERR.

spark/conf/log4j2.properties.template

Lines 20 to 32 in 78d492c

	rootLogger.appenderRef.stdout.ref = console
	# In the pattern layout configuration below, we specify an explicit `%ex` conversion
	# pattern for logging Throwables. If this was omitted, then (by default) Log4J would
	# implicitly add an `%xEx` conversion pattern which logs stacktraces with additional
	# class packaging information. That extra information can sometimes add a substantial
	# performance overhead, so we disable it in our default logging config.
	# For more information, see SPARK-39361.
	appender.console.type = Console
	appender.console.name = console
	appender.console.target = SYSTEM_ERR
	appender.console.layout.type = PatternLayout
	appender.console.layout.pattern = %d{yy/MM/dd HH:mm:ss} %p %c{1}: %m%n%ex

Does this PR introduce any user-facing change?

No

How was this patch tested?

Pass GitHub Actions

[LuciferYang]

friendly ping @srowen @HyukjinKwon @dongjoon-hyun @viirya

[viirya]

Thanks for fixing it.

[viirya]

Thanks. Merging to master.

[LuciferYang]

thanks @HyukjinKwon @viirya