Update cloud_project_database.html.markdown

[gnublin]

Specify all plan available related to the database type.

Description

Improve the documentation explaining all plan available related to the engine type.

Type of change

Please delete options that are not relevant.

• Documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my 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 or issues
• I have added acceptance tests that prove my fix is effective or that my feature works
• New and existing acceptance tests pass locally with my changes
• I ran succesfully go mod vendor if I added or modify go.mod file