Adapt Kolla to stack-oriented framework

This change adapts kolla installer to SOF approach. The change summary is as
below:

1. Package playbook and role are moved to the stack
2. playbooks and roles for pre-deployment and post-deployment are renamed to
  preinstall and postinstall respectively.
3. vars moved to the stack and only the kolla installer version is
  controlled in this repo
4. install.sh modified for SOF
5. pre/post operations moved to the stack

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