[test][spark] Fix the unstable testHiveCatalogOptions

[Zouxxyy]

Purpose

drop database created in testBuildWithHive

Error:  org.apache.paimon.spark.SparkGenericCatalogWithHiveTest.testBuildWithHive(Path)  Time elapsed: 0.058 s  <<< ERROR!
org.apache.spark.sql.catalyst.analysis.NamespaceAlreadyExistsException: 
[SCHEMA_ALREADY_EXISTS] Cannot create schema `my_db` because it already exists.
Choose a different name, drop the existing schema, or add the IF NOT EXISTS clause to tolerate pre-existing schema.

Tests

API and Format

Documentation

[JingsongLi]

+1