Be able to update elasticity policies of a running service

[al3xhh]

Description
This new functionality will add a new endpoint in the OneFlow server to update the elasticity policies in a running service.

Use case
It is very common that due to necessities, the policies change, so it is very useful to update an existing service instead of create a new one.

Interface Changes

• OneFlow server
• CLI
• Sunstone

Progress Status

• Branch created
• Code committed to development branch
• Testing - QA
• Documentation
• Release notes - resolved issues, compatibility, known issues
• Code committed to upstream release/hotfix branches
• Documentation committed to upstream release/hotfix branches

[al3xhh]

Related with #4912