fix(prodtest): fix haptic test

[cepetr]

This PR fixes the haptic test in prodtest. The bug was introduced in #4430 but is not present in any official release.

The logic for driver initialization and deinitialization has been refined:

1. All drivers are initialized in drivers_init() when prodtest starts.
2. Each test calls {driver}_init() and checks the result.
3. No test should call {driver}_deinit(), ensuring that all drivers remain active throughout.

[github-actions]

core UI changes	device test	click test	persistence test
T2T1 Model T	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
T3B1 Safe 3	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
T3T1 Safe 5	test(screens) main(screens)	test(screens) main(screens)	test(screens) main(screens)
All	main(screens)