Some minor renames in attachment service API (#5687)

## Problem

## Summary of changes

## Checklist before requesting a review

- [x] I have performed a self-review of my code.
- [ ] ~~If it is a core feature, I have added thorough tests.~~
- [ ] ~~Do we need to implement analytics? if so did you add the
relevant metrics to the dashboard?~~
- [ ] ~~If this PR requires public announcement, mark it with
/release-notes label and add several sentences in this section.~~

## Checklist before merging

- [ ] Do not forget to reformat commit message to not include the above
checklist

test_runner/fixtures/neon_fixtures.py

@@ -1554,8 +1554,8 @@ class NeonAttachmentService:
 
     def attach_hook(self, tenant_id: TenantId, pageserver_id: int) -> int:
         response = requests.post(
-            f"{self.env.control_plane_api}/attach_hook",
-            json={"tenant_id": str(tenant_id), "pageserver_id": pageserver_id},
+            f"{self.env.control_plane_api}/attach-hook",
+            json={"tenant_id": str(tenant_id), "node_id": pageserver_id},
         )
         response.raise_for_status()
         gen = response.json()["gen"]