fix(secret): corrects corresponding list functions (#310)

Due to a recent refactor in the v2 client library,
the list secrets function now returns the entire
secret objects instead of just reading the metadata
in the previous implementation. This changed object
altogther and the way other sections of code fetched
the secret name.

This commit addresses the issue by correcting the
list_secrets function.

riocli/secret/list.py

@@ -34,7 +34,7 @@ def list_secrets() -> None:
     try:
         client = new_v2_client(with_project=True)
         secrets = client.list_secrets()
-        secrets = sorted(secrets, key=lambda s: s.name.lower())
+        secrets = sorted(secrets, key=lambda s: s.metadata.name.lower())
         _display_secret_list(secrets, show_header=True)
     except Exception as e:
         click.secho(str(e), fg=Colors.RED)
@@ -49,7 +49,7 @@ def _display_secret_list(
     if show_header:
         headers = ('ID', 'Name', 'Created At', 'Creator')
 
-    data = [ [secret.guid, secret.name,
-                secret.createdAt, secret.creatorGUID] for secret in secrets ]
+    data = [ [secret.metadata.guid, secret.metadata.name,
+                secret.metadata.createdAt, secret.metadata.creatorGUID] for secret in secrets ]
 
     tabulate_data(data, headers)