Includes:

• SERVER-137538 — Schedule ARM retry backoff with scheduleWorkAt (https://github.com/10gen/mongo/pull/64901)
• SERVER-137539 — Shut down the ARM sub-baton at the start of kill() (https://github.com/10gen/mongo/pull/64902)
• SERVER-137541 — Move ARM killCursors scheduling onto RemoteCursorData (https://github.com/10gen/mongo/pull/64904)
• SERVER-137542 — Target each remote cursor's own namespace in ARM killCursors (https://github.com/10gen/mongo/pull/64905)
• SERVER-138521 — Bump pinned jstestfuzz rev for deterministic fuzzer tasks (https://github.com/10gen/mongo/pull/65919)

Stacked on #65899 (SERVER-138499); must merge after it.
Batch PR: https://github.com/10gen/mongo/pull/66033