feat(site): add a provisioner warning to workspace builds (#15686)

This PR adds warnings about provisioner health to workspace build pages.
It closes https://github.com/coder/coder/issues/15048


![image](https://github.com/user-attachments/assets/fa54d0e8-c51f-427a-8f66-7e5dbbc9baca)

![image](https://github.com/user-attachments/assets/b5169669-ab05-43d5-8553-315a3099b4fd)

cli/testdata/coder_list_--output_json.golden

@@ -50,7 +50,12 @@
       "deadline": "[timestamp]",
       "max_deadline": null,
       "status": "running",
-      "daily_cost": 0
+      "daily_cost": 0,
+      "matched_provisioners": {
+        "count": 0,
+        "available": 0,
+        "most_recently_seen": null
+      }
     },
     "outdated": false,
     "name": "test-workspace",