Refactoring of USB API

[cepetr]

This PR simplifies the USB stack API:

• Significantly reduces the number of USB driver syscalls
• Moves hardware-specific code to the kernel
• Introduces new generic read/write syscalls
• Consolidates USB initialization from multiple locations into a single place in the kernel
• Allows partial reconfiguration (changing the serial number) of the USB stack on the fly

[github-actions]

en main(all)

model	device_test	click_test	persistence_test
T2T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3B1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3T1	test(all) main(all)	test(all) main(all)	test(all) main(all)
T3W1	test(all) main(all)	test(all) main(all)	test(all) main(all)

Latest CI run: 17154172869