rotaryio.IncrementalEncoder deinit fix and improvements

[dhalbert]

• Fixes RP2xxx: crash after rotaryio constructor exception #10487

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• In raspberrypi rotaryio.IncrementalEncoder, make object be marked as deinited if constructor fails.
• In all rotaryio.IncrementalEncoder implementations, implement and use common_hal_rotaryio_incrementalencoder_mark_deinit() consistently and same for rp2pio.StateMachine.

Note that in some previous implementations, both IncrementalEncoder pins were NULL'd out on deinit. This was not really necessary, because the deinit test just checks that one of the pins is NULL, which is good enough.

I tested on RP2040 to show that bug no longer occurs. Also tested StateMachine deinit() still works.
I also tested on all other ports that implement rotaryio that creation and deinit of IncrementalEncoder still works: atmel-samd, espressif, nordic, mimxrt10xx.

@Hagtronics FYI

[tannewt]

Thank you!