feat: viettel cloud dbaas mysql

[hoangndst]

What type of PR is this?

/kind feature

What this PR does / why we need it:

For using Viettel Cloud DBaaS MySQL.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Additional documentation e.g., design docs, usage docs, etc.: