[SPARK-3065][SQL] Add Locale setting to HiveCompatibilitySuite to fix run udf_unix_timestamp with not "America/Los_Angeles" TimeZone

When run the udf_unix_timestamp of org.apache.spark.sql.hive.execution.HiveCompatibilitySuite testcase
with not "America/Los_Angeles" TimeZone throws error. [https://issues.apache.org/jira/browse/SPARK-3065]
add locale setting on beforeAll and afterAll method to fix the bug of HiveCompatibilitySuite testcase