Update engine openstack stack to adapt SOF

This change introduces openstack stack for engine in order to package,
deploy, and test stacks independently from engine core.

Checklist:
- [X]  Move packaging functionality from installer to stack
- [X]  Enable online deployment with scenarios
- [X]  Enable offline deployment with scenarios
- [X]  Move scenarios from respective installer to stack
- [X]  Move scenario and common pre/post Install operations from respective installer to stack

Depends-On: I13a8a066932b74fab8da7c4c19a78c7fded098bd
Signed-off-by: eprasad <prasad.mukhedkar@est.tech>
Change-Id: Ia0bb0b386faf17aad76dc65224aba597e0d82ead
31 files changed