Some tests need more work.
* The adc test builds, but isn't set up correctly for the 2350 hardware
yet.
* The multicore and gpio_multicore tests only work from flash,
seems to be a probe-rs issue.
* The i2c and flash tests also only works from flash, these are probably
bugs but I don't have time to run them down now.
* The 2350 gpio test skips anything with pull downs. I think these fail
because of E9.
The float, bootsel, cyw43, and ethernet tests don't have 2350 equivalents.
There's no reason to use the float romfuncs, use the FPU.
Bootsel as a button isn't supported on the 2350 yet.
The wifi and eth tests don't have appropriate hardware.
The i2c test has also been tweaked to run on one core.