refactor: use StrEnum for string enum classes

Replace custom string enum classes with Python's enum.StrEnum for better
type safety and clarity.

Author: mkoura

cardano_node_tests/utils/cluster_nodes.py

@@ -1,6 +1,7 @@
 """Functionality for cluster setup and interaction with cluster nodes."""
 
 import dataclasses
+import enum
 import functools
 import json
 import logging
@@ -43,10 +44,10 @@ class ServiceStatus:
     message: str = ""
 
 
-class Testnets:
-    preview: tp.Final[str] = "preview"
-    preprod: tp.Final[str] = "preprod"
-    mainnet: tp.Final[str] = "mainnet"
+class Testnets(enum.StrEnum):
+    preview = "preview"
+    preprod = "preprod"
+    mainnet = "mainnet"
 
 
 class ClusterType:

cardano_node_tests/utils/clusterlib_utils.py

@@ -60,10 +60,10 @@ class ChainAccount:
     treasury: int
 
 
-class BuildMethods:
-    BUILD: tp.Final[str] = "build"
-    BUILD_RAW: tp.Final[str] = "build_raw"
-    BUILD_EST: tp.Final[str] = "build_estimate"
+class BuildMethods(enum.StrEnum):
+    BUILD = "build"
+    BUILD_RAW = "build_raw"
+    BUILD_EST = "build_estimate"
 
 
 class KeyGenMethods(enum.StrEnum):

cardano_node_tests/utils/requirements.py

@@ -4,15 +4,14 @@
 import json
 import logging
 import pathlib as pl
-import typing as tp
 
 from cardano_node_tests.utils import helpers
 
 LOGGER = logging.getLogger(__name__)
 
 
-class GroupsKnown:
-    CHANG_US: tp.Final[str] = "chang_us"
+class GroupsKnown(enum.StrEnum):
+    CHANG_US = "chang_us"
 
 
 class Statuses(enum.Enum):

cardano_node_tests/utils/submit_utils.py

@@ -1,15 +1,15 @@
+import enum
 import shutil
-import typing as tp
 
 import pytest
 from cardano_clusterlib import clusterlib
 
 from cardano_node_tests.utils import submit_api
 
 
-class SubmitMethods:
-    API: tp.Final[str] = "api"
-    CLI: tp.Final[str] = "cli"
+class SubmitMethods(enum.StrEnum):
+    API = "api"
+    CLI = "cli"
 
 
 # The "submit_method" is a fixtrue defined in `conftest.py`.