Allow toggling of autosync per service

[simcap]

awless syncs automatically cloud resources (across services) locally as RDF graphs.

At the moment the auto-sync run as such:

• pre and post awless run command
• pre and post awless create, delete, ... (template one-liners) commands
• pre awless show command

Note that a manual sync (per service if chosen) can be done via awless sync.

Although the sync fetches in parallel, we might want to ignore some services and therefore not automatically resolve their resources.

Examples:

• You might want to work and administrate solely your infra, access and queuing services while ignoring huge amount of resources on your storage service.
• You might not have rights to access every cloud service, hence triggering some errors while fetching resources.

In the config we will flush by default:

infra.autosync = true
storage.autosync = true
access.autosync = true
...

Disabling an auto-sync is therefore now just awless config set storage.autosync false