Interrupt refactor #279

Job	Run time
Unit Test UF2 (ubuntu-latest)	40s
Unit Test Regz (windows-latest)	2m 17s
Unit Test Regz (ubuntu-latest)	1m 0s
Unit Test UF2 (windows-latest)	1m 13s
Unit Test Regz (macos-latest)	1m 3s
Check that stm32 generated code is up to date	3m 0s
Unit Test UF2 (macos-latest)	48s
Unit Test Ports (ubuntu-latest, gigadevice/gd32)	27s
Build (ubuntu-latest)	44s
Unit Test Ports (windows-latest, gigadevice/gd32)	1m 14s
Build (windows-latest)	1m 27s
Build (macos-latest)	42s
Unit Test Ports (windows-latest, raspberrypi/rp2xxx)	1m 13s
Unit Test Ports (macos-latest, gigadevice/gd32)	33s
Unit Test Ports (windows-latest, stmicro/stm32)	1m 18s
Unit Test Ports (ubuntu-latest, raspberrypi/rp2xxx)	38s
Unit Test Ports (macos-latest, stmicro/stm32)	41s
Unit Test Ports (macos-latest, raspberrypi/rp2xxx)	41s
Build Examples (stmicro/stm32)	38s
Build Examples (gigadevice/gd32)	2m 24s
Build Examples (wch/ch32v)	2m 30s
Build Examples (nordic/nrf5x)	2m 6s
Build Examples (microchip/atsam)	2m 3s
Build Examples (microchip/avr)	2m 20s
Build Examples (raspberrypi/rp2xxx)	2m 32s
Build Examples (espressif/esp)	2m 17s
Build Examples (nxp/lpc)	1m 59s
Dry Run Packaging	2m 19s
Build Website	2m 47s
Unit Test Ports (ubuntu-latest, stmicro/stm32)	23s
	43m 57s

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