Provide Agbot APIs to list compatible nodes for given constrains or patterns

[LiilyZhang]

Add 2 APIs to return compatible nodes in given org:

1. given constrains, return list of nodes. GET /compatibility/constraints/node?policyType={policyType} (policy type could be: nmp or dp) Input body:

   {
   "node_org":  "userdev",
   "constraints": [
        "node.owner == user123 && cpu > 200",
        "purpose == test",
        ...
   ]
   }

   Check the node property based on the policy type

2. given list of patterns (GET /compatibility/patterns/node) Input body:

   {
   "node_org":  "userdev",
   "patterns": [
       "userdev/pattern1",
       "publicOrg/pattern1",
       ...
   
   ]
   }

User experience:

1. root or hub admin: can get results
2. org admin: (check against the node org) can get results
3. regular user: receive 403. Org admin of a different org will be treated as regular user in the org that he doesn't have admin privileged.
4. node: receive 403