feat: Added SSH Tunnel for Postgres (#35449)
@appsmithorg/contributor-support
Hi @rohan-arthur
Fixes #30792
[**Video
Demonstration**](https://drive.google.com/file/d/1IOGlTsPVgeBNOpq3vydO01lrcN10S8ZS/view?usp=sharing)
**What's in this pr :**
- Added connection mode option for SSH Tunnel.
- Added SSH Host, Port, SSH Username and SSH key fields.
- Added Validation logic for SSH fields.
- Added SSH connection logic.
- Added three test cases for SSH connection.
**Screenshots :**
Please review this pr. Let me know if any changes required.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
## Summary by CodeRabbit
- **New Features**
- Introduced SSH tunneling support for PostgreSQL connections, allowing
users to configure SSH settings for enhanced security.
- Added a new "Connection method" option in the configuration, enabling
selection between "Standard" and "SSH tunnel" connections, with relevant
fields for SSH details.
- **Bug Fixes**
- Improved error handling by adding specific error messages for missing
SSH configuration parameters, providing clearer feedback to users.
- Updated error messages for authentication issues to include missing
passwords.
- **Tests**
- Enhanced test coverage with new unit tests for validating the
configuration of PostgreSQL data sources, particularly for SSH
connections.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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