Use fixtures in deCONZ alarm control panel tests

[Kane610]

Breaking change

Proposed change

SSIA

Related to #120863, #120936, #120938, #120943, #120944, #120947, #120948, #120953, #120954, #120966

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[bdraco]

If order doesn't matter here you could use @pytest.mark.usefixtures for mock_deconz_websocket

[bdraco]

Actually it looks like you call it, so would be nice to type it, but it looks like it only uses kwargs?

[Kane610]

My plan is to type it in its own PR to keep these other PRs to keep them as small as possible

[Kane610]

Thanks @bdraco 🎉