HIVE-28838: Remove sensitive jdbc properties from explain plan for JdbcStorageHandler tables

[InvisibleProgrammer]

It removes the following sensitive properties from tables created with JdbcStorageHandler:

• hive.sql.dbcp.username
• hive.sql.dbcp.password

Why are the changes needed?

Explain extended can cause a security issue if they query sys tables: Sys tables are created with JdbcStorageHandler and so that, the output of explain extended will contain sensitive jdbc connection info.

Does this PR introduce any user-facing change?

Yes, it removes the listed properties from explain extended output when a JdbcStorageHandler table is included in a query.

Is the change a dependency upgrade?

No

How was this patch tested?

QTest added: explain_systest_password.q

[InvisibleProgrammer]

@zhangbutao , @zratkai , @deniskuzZ , thank you for the reviews so far. Do I have any question that I didn't answer or needs more to discuss about?

Thank you

[sonarqubecloud[bot]]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud