feat: Add new gcloud commands, API clients, and third-party libraries across various services.

gcloud auth application-default login/google-cloud-sdk/lib/surface/healthcare/datasets/update.yaml

@@ -0,0 +1,29 @@
+- release_tracks: [ALPHA, BETA, GA]
+
+  help_text:
+    brief:  Update a Cloud Healthcare API dataset.
+    description: Update a Cloud Healthcare API dataset.
+    examples: |
+      To update the dataset 'test-dataset', run:
+
+        $ {command} test-dataset --time-zone=PDT
+
+  request:
+    collection: healthcare.projects.locations.datasets
+    ALPHA:
+      api_version: v1alpha2
+    BETA:
+      api_version: v1beta1
+    GA:
+      api_version: v1
+
+  arguments:
+    resource:
+      help_text: Cloud Healthcare API dataset you want to update.
+      spec: !REF googlecloudsdk.command_lib.healthcare.resources:dataset
+
+    params:
+    - arg_name: time-zone
+      api_field: dataset.timeZone
+      help_text: |
+        Default timezone used by this dataset.