refactor: modernize floating_ip and primary_ip modules (#771)

##### SUMMARY

Use the latest best practices for modules, and prepare for the upcoming
changes.

plugins/module_utils/floating_ip.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from ..module_utils.vendor.hcloud.floating_ips import (
+    BoundFloatingIP,
+)
+
+
+def prepare_result(o: BoundFloatingIP):
+    return {
+        "id": o.id,
+        "name": o.name,
+        "description": o.description,
+        "ip": o.ip,
+        "type": o.type,
+        "home_location": o.home_location.name,
+        "labels": o.labels,
+        "server": o.server.name if o.server is not None else None,
+        "delete_protection": o.protection["delete"],
+    }