Update Docker images to use Ubuntu and workflows split

[masesdevelopers]

Description

The PR updates the base image used in the containers, plus adds a specific workflow to manually trigger the Docker image generation linked to the release workflow too.

Related Issue

closed #438

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.