Regenerate client from commit 8c9b068 of spec repo (#3521)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.generator/schemas/v2/openapi.yaml

@@ -116514,12 +116514,22 @@ paths:
   /api/v2/metrics/{metric_name}/volumes:
     get:
       description: |-
-        View distinct metrics volumes for the given metric name.
+        View hourly average metric volumes for the given metric name over the look back period.
 
         Custom metrics generated in-app from other products will return `null` for ingested volumes.
       operationId: ListVolumesByMetricName
       parameters:
         - $ref: "#/components/parameters/MetricName"
+        - description: |-
+            The number of seconds of look back (from now).
+            Default value is 3,600 (1 hour), maximum value is 2,592,000 (1 month).
+          example: 7200
+          in: query
+          name: window[seconds]
+          required: false
+          schema:
+            format: int64
+            type: integer
       responses:
         "200":
           content:

src/datadog_api_client/v2/api/metrics_api.py

@@ -469,6 +469,11 @@ def __init__(self, api_client=None):
                     "attribute": "metric_name",
                     "location": "path",
                 },
+                "window_seconds": {
+                    "openapi_types": (int,),
+                    "attribute": "window[seconds]",
+                    "location": "query",
+                },
             },
             headers_map={
                 "accept": ["application/json"],
@@ -1012,20 +1017,28 @@ def list_tags_by_metric_name(
     def list_volumes_by_metric_name(
         self,
         metric_name: str,
+        *,
+        window_seconds: Union[int, UnsetType] = unset,
     ) -> MetricVolumesResponse:
         """List distinct metric volumes by metric name.
 
-        View distinct metrics volumes for the given metric name.
+        View hourly average metric volumes for the given metric name over the look back period.
 
         Custom metrics generated in-app from other products will return ``null`` for ingested volumes.
 
         :param metric_name: The name of the metric.
         :type metric_name: str
+        :param window_seconds: The number of seconds of look back (from now).
+            Default value is 3,600 (1 hour), maximum value is 2,592,000 (1 month).
+        :type window_seconds: int, optional
         :rtype: MetricVolumesResponse
         """
         kwargs: Dict[str, Any] = {}
         kwargs["metric_name"] = metric_name
 
+        if window_seconds is not unset:
+            kwargs["window_seconds"] = window_seconds
+
         return self._list_volumes_by_metric_name_endpoint.call_with_http_info(**kwargs)
 
     def query_scalar_data(