Add flag for configuration DSN

[aburtasov]

Description

Another way to configure DSN.
This is relevant for Windows systems, where it is difficult to forward an environment variable

Type of change

• [+] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

It worked on Winodws with OracleDB

Screenshots (if appropriate):

Test where dsn was output to the console

Checklist:

• [+] My code follows the style guidelines of this project
• [+ ] I have performed a self-review of my own code
• [+ ] I have commented my code, particularly in hard-to-understand areas
• [+ ] I have made corresponding changes to the documentation
• [+ ] My changes generate no new warnings
• [+ ] I have added tests that prove my fix is effective or that my feature works
• [+ ] New and existing unit tests pass locally with my changes
• [+ ] Any dependent changes have been merged and published in downstream modules
• [+ ] Updated version in Makefile respecting semver v2