base: Add mariadb client

[surajssd]

No description provided.

[priyaananthasankar]

Can we add the vulnerability scan report for mariadb, the package details and mysql package history of vulns in the PR as a comment? We can tally these with the public document.

[surajssd]

We decided to remove mysql and replace it with mariadb because of few reasons listed here:

• MySQL mariner package was consistently racking up vulnerabilities.
• The MySQL package on Mariner also ships the server and the client in one package, users cannot start a MySQL server on CloudShell as shown in this issue. I have filed an issue with Mariner on separating the client and server into two but didn't get any response.
• OTOH, Mariadb package on mariner ships only the client which is a perfect for our needs. Mariadb is compatible with the MySQL clients.