SDK 2.2.0 Release

wow; runtime.c has been missing from host/pico_runtime for a while

add pico_status_led to host (#2605)

Fix build issue with status led (#2600)

pico_status_led doxygen improvements (#2601)

fix errors in generated headers/SVD (#2599)

pico_rand (#2598)

Enable hardware_irq library also in host and not only in rp2_common (#2596)

add pico_status_led (#2501)

pico_encode_gpio_wait doc improvement (#2579)

add some missing pico_config and pico_cmake_config entries (#2559)

merge (discarding changes) one off master fix back into develop

Update docs, and add methods for new RP2350 DMA features (#2588)

Refactor extraction-scripts to reduce code-duplication (#2592)

Doxygen "group" fixes (#2591)