Support a new custom remediation specifically to allow for dynamic rememdation overrides heir_config exposes about nautobot-app-golden-config

[jtdub]

Here were the contents of the configurations:

% cat running_acl.conf
ip access-list TEST
  10 permit ip host 192.2.0.1
  20 permit ip host 192.2.0.2
% cat generated_acl.conf
ip access-list TEST
  10 permit ip host 192.2.0.1

When I imagine hier_config dynamic remediation's in GC, I imagine a repo folder structure with dynamic remediation conf scripts.

Something like:

hier_config_dynamic_remediations/
|
+-- acl.py

When the repo is loaded into Nautobot, Nautobot registers the dynamic remediation's into the ORM. At that point, you can create a dynamic remediation mapping of:

1. expression_choice: ["startswith", "endswith", "equals", "contains"]
2. config_str: "ip access-list TEST"
3. dynamic_remediation_choice: [list of registered dynamic remediations]
4. platform(s): platforms to execute dynamic remediation against
5. enabled: Boolean

At that point, when hier_config is invoked, hier_config can invoke the dynamic remediation as part of the remediation process.