Merged PR 235: Refactor describe_state to use name/hostname instead of UUID as primary key

## Summary
- Refactor Simulator state to use service/application name instead of UUID, and node hostname instead of UUID.
- Refactor observations to read the hostname/name instead of UUID.
- Refactor rewards as well.
- Refactor configs to specify name instead of reference that will be translated to UUID.

## Test process
Existing unit tests pass. Inspected the printout from running 'describe_state' on arcd_uc2_network' to verify that names are used to report state.

## Checklist
- [x] PR is linked to a **work item**
- [x] **acceptance criteria** of linked ticket are met
- [x] performed **self-review** of the code
- [na] written **tests** for any new functionality added with this PR
- [na] updated the **documentation** if this PR changes or adds functionality
- [x] written/updated **design docs** if this PR implements new functionality
- [na] updated the **change log**
- [x] ran **pre-commit** checks for code style
- [x] attended to any **TO-DOs** left in the code

Related work items: #2131

src/primaite/simulator/system/processes/process.py

@@ -41,5 +41,5 @@ class Process(Software):
         :rtype: Dict
         """
         state = super().describe_state()
-        state.update({"operating_state": self.operating_state.name})
+        state.update({"operating_state": self.operating_state.value})
         return state