test: Add test_node_ops_metrics.py

It tests the node_ops_metrics_done metric reaches 100% when a node ops
is done.

Refs: #21174
(cherry picked from commit 9868ccbac0)

test/topology_custom/test_node_ops_metrics.py

@@ -0,0 +1,35 @@
+#
+# Copyright (C) 2024-present ScyllaDB
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+#
+import asyncio
+import pytest
+import logging
+
+logger = logging.getLogger(__name__)
+
+@pytest.mark.asyncio
+async def test_bootstrap_removenode_metrics(manager):
+    cfg = {'enable_repair_based_node_ops': True}
+    servers = [await manager.server_add(config=cfg),
+               await manager.server_add(config=cfg),
+               await manager.server_add(config=cfg)]
+    await manager.server_stop_gracefully(servers[2].server_id)
+    await manager.remove_node(servers[0].server_id, servers[2].server_id)
+
+    def check_ops(metrics, ops):
+        metric_name = "scylla_node_ops_finished_percentage"
+        shard = 0
+        while True:
+            cnt = metrics.get(name=metric_name, labels={'ops': ops}, shard=str(shard))
+            if cnt == None:
+                break
+            logger.info(f"Checking {shard=} {cnt=}")
+            assert int(cnt) == 1
+            shard = shard + 1
+
+    for s in servers[:2]:
+        metrics = await manager.metrics.query(s.ip_addr)
+        check_ops(metrics, 'bootstrap')
+        check_ops(metrics, 'removenode')