RFE: Shared state between scenarios

[cidrblock]

As a user, I want tp specifythe location of the state file for a scenario in the molecule.yml

Use cases:

• Sharing state between scenarios would allow any one scenario to create, prepare, or destroy infrastructure necessary for testings
• Would allow for the grouping of scenarios to share infrastructure for testing
• Would eliminate the need for monolithic scenarios in place to simply to minimize the infrastructure provisioning.

Note:

• Care will need to be taking by the user if running scenarios in parrellel that share state as a race condition might occur during provsioning. The documented approach might suggest soemthing like running molecule prepare prior to running parrellel scenarios, effectively using the default scenario as the provisioner
• Care will need to be taken by the user to disable the destroy step for scenarios using a shared state. If not, this could result in reprovisioning for each scenario. The docuemented approach might be to disable destroy for all but the default scenario

Related #4000 could provide the vars necessary to define the location of the shared state