fix(iam): inject default limit on users list to ensure paginated response

The IAM users list endpoint returns a flat array when no limit/offset
is provided, breaking SDK pagination. This defaults limit to 50 so
the API always returns the paginated envelope with count/results.

Author: pedrodeoliveira

src/gcore/resources/iam/users.py

@@ -111,7 +111,7 @@ def update(
     def list(
         self,
         *,
-        limit: int | Omit = omit,
+        limit: int | Omit = 50,
         offset: int | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.
@@ -368,7 +368,7 @@ async def update(
     def list(
         self,
         *,
-        limit: int | Omit = omit,
+        limit: int | Omit = 50,
         offset: int | Omit = omit,
         # Use the following arguments if you need to pass additional parameters to the API that aren't available via kwargs.
         # The extra values given here take precedence over values defined on the client or passed to this method.