[Enhancement] Allow cloud guard input parameters to be passed into cloud guard tests

**Is your feature request related to a problem? Please describe.**

Currently it does not seem like Cloudformation Guard has an easy way allow input parameters to Cloudformation Guard rules to be part of cfn-guard tests. The current organization that I work on has a stable yet growing list for for certain tag values and creating a dynamic input variable is important so that we don't have to keep up

**Describe the solution you'd like**
It would be a useful feature to have an option like "--test-input-parameters " to be able to have inputs parameters for cloud guard be something that can be utilized in cloud guard.

**Describe alternatives you've considered**
I have considered dynamically creating the variables in cloud guard during runtime so that the variable points at the input file during a validate but has the whole list during tests. This is doable but not a native solution to the cloud guard tool.

Start by locating the CloudFormation Guard test command and how test inputs and rule variables are currently loaded. Determine how an input-parameter file should be passed through the proposed --test-input-parameters option, then add coverage showing that cloud guard tests can use those values; done means the requested test-time parameters work without runtime-generated variables.

Written by the indexing model from the issue text.