Unnecessary repeated machine.count calls

[sparkiegeek]

Describe the bug
When loading the machine listing page, 6 calls are made to machine.count, four are without parameters, two are with {"filter": {}}

All 6 get the same response with `{"count": 15}' or however many machines are available

maas-ui version
3.3.0~beta1

MAAS version
3.3.0~beta1

To Reproduce
Steps to reproduce the behaviour:

1. Go to 'http://bolla.internal:5240/MAAS/r/machines'
2. Open DevTools, Network and find the websocket
3. Look at the Response tab
4. Filter for machine.count
5. See 6 machine.count

Expected behaviour
See one machine.count call

Screenshots

Desktop (please complete the following information):

• OS: Ubuntu 22.04 LTS
• Browser: Firefox
• Version: 105.0.2

Additional context
Add any other context about the problem here.

[petermakowski]

Related: #4274