* Delay firmware probing until after the user picks the firmware type
* Remove confirmation step
* Fix unit tests
* Simplify unit test patching logic
Further simplify unit tests
* Bump Zigbee firmware up to the first choice
* Reuse `async_step_pick_firmware` during options flow
* Proactively validate all ZHA entries, not just the first
There can only be one (for now) so this changes nothing functionally
* Add unit test for bad firmware when configuring Thread
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