Port VM autobackups into pvcworkerd with snaps

Moves VM autobackups from being in-CLI to being handled by the
pvcworkerd system on the primary coordinator. Turns the CLI autobackup
command into an actual API client endpoint rather than having its logic
in the CLI.

In addition, modifies the new autobackup to leverage the new "pvc vm
snapshot" function set, just with special snapshot names. This helps
automate this within the new snapshot scaffolding.

api-daemon/pvcapid/flaskapi.py

@@ -3515,6 +3515,70 @@ class API_VM_Snapshot_Import(Resource):
 api.add_resource(API_VM_Snapshot_Import, "/vm/<vm>/snapshot/import")
 
 
+# /vm/autobackup
+class API_VM_Autobackup_Root(Resource):
+    @RequestParser(
+        [
+            {"name": "force_full"},
+            {"name": "email_recipients"},
+        ]
+    )
+    @Authenticator
+    def post(self, reqargs):
+        """
+        Trigger a cluster autobackup job
+        ---
+        tags:
+          - provisioner
+        parameters:
+          - in: query
+            name: force_full
+            type: boolean
+            required: false
+            description: If set and true, triggers a full autobackup regardless of schedule
+          - in: query
+            name: email_recipients
+            type: array
+            description: A list of email addresses to send failure and report emails to
+            items:
+              type: string
+              example: "user@domain.tld"
+        responses:
+          200:
+            description: OK
+            schema:
+              type: object
+              properties:
+                task_id:
+                  type: string
+                  description: Task ID for the provisioner Celery worker
+          400:
+            description: Bad request
+            schema:
+              type: object
+              id: Message
+        """
+
+        task = run_celery_task(
+            "cluster.autobackup",
+            force_full=reqargs.get("force_full", False),
+            email_recipients=reqargs.get("email_recipients", None),
+            run_on="primary",
+        )
+        return (
+            {
+                "task_id": task.id,
+                "task_name": "cluster.autobackup",
+                "run_on": f"{get_primary_node()} (primary)",
+            },
+            202,
+            {"Location": Api.url_for(api, API_Tasks_Element, task_id=task.id)},
+        )
+
+
+api.add_resource(API_VM_Autobackup_Root, "/vm/autobackup")
+
+
 ##########################################################
 # Client API - Network
 ##########################################################
@@ -5070,7 +5134,7 @@ class API_Storage_Ceph_Benchmark(Resource):
             {
                 "task_id": task.id,
                 "task_name": "storage.benchmark",
-                "run_on": get_primary_node(),
+                "run_on": f"{get_primary_node()} (primary)",
             },
             202,
             {"Location": Api.url_for(api, API_Tasks_Element, task_id=task.id)},
@@ -9326,7 +9390,7 @@ class API_Provisioner_Create_Root(Resource):
             {
                 "task_id": task.id,
                 "task_name": "provisioner.create",
-                "run_on": get_primary_node(),
+                "run_on": f"{get_primary_node()} (primary)",
             },
             202,
             {"Location": Api.url_for(api, API_Tasks_Element, task_id=task.id)},