[SPARK-28642][SQL] Hide credentials in SHOW CREATE TABLE
## What changes were proposed in this pull request?
[SPARK-17783](https://issues.apache.org/jira/browse/SPARK-17783) hided Credentials in `CREATE` and `DESC FORMATTED/EXTENDED` a PERSISTENT/TEMP Table for JDBC. But `SHOW
CREATE TABLE` exposed the credentials:
```sql
spark-sql> show create table mysql_federated_sample;
CREATE TABLE `mysql_federated_sample` (`TBL_ID` BIGINT, `CREATE_TIME` INT, `DB_ID` BIGINT, `LAST_ACCESS_TIME` INT, `OWNER` STRING, `RETENTION` INT, `SD_ID` BIGINT, `TBL_NAME` STRING, `TBL_TYPE` STRING, `VIEW_EXPANDED_TEXT` STRING, `VIEW_ORIGINAL_TEXT` STRING, `IS_REWRITE_ENABLED` BOOLEAN)
USING org.apache.spark.sql.jdbc
OPTIONS (
`url` 'jdbc:mysql://localhost/hive?user=root&password=mypasswd',
`driver` 'com.mysql.jdbc.Driver',
`dbtable` 'TBLS'
)
```
This pr fix this issue.
## How was this patch tested?
unit tests and manual tests:
```sql
spark-sql> show create table mysql_federated_sample;
CREATE TABLE `mysql_federated_sample` (`TBL_ID` BIGINT, `CREATE_TIME` INT, `DB_ID` BIGINT, `LAST_ACCESS_TIME` INT, `OWNER` STRING, `RETENTION` INT, `SD_ID` BIGINT, `TBL_NAME` STRING, `TBL_TYPE` STRING, `VIEW_EXPANDED_TEXT` STRING, `VIEW_ORIGINAL_TEXT` STRING, `IS_REWRITE_ENABLED` BOOLEAN)
USING org.apache.spark.sql.jdbc
OPTIONS (
`url` '*********(redacted)',
`driver` 'com.mysql.jdbc.Driver',
`dbtable` 'TBLS'
)
```
Closes #25375 from wangyum/SPARK-28642.
Authored-by: Yuming Wang <yumwang@ebay.com>
Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
d19a56f9db