Threading support for the `rp2040` platform #1797

Job	Run time
check-diff / check	26s
serialization / serialization-tests	46s
cpp / cpp-ros2-tests / cpp-ros2-tests	45s
cpp / cpp-benchmark-tests / benchmark-tests	56s
cpp / cpp-tests / regular-tests (ubuntu-latest)	47s
cpp / cpp-tests / regular-tests (macos-latest)	1s
c / benchmarking / benchmark-tests	57s
cpp / cpp-tests / regular-tests (windows-latest)	36s
c / arduino / arduino-tests (ubuntu-latest)	53s
c / arduino / arduino-tests (macos-latest)	1s
c / ccpp / regular-tests (ubuntu-latest)	1m 0s
c / default / regular-tests (ubuntu-latest)	59s
c / ccpp / regular-tests (macos-latest)	1s
c / default / regular-tests (macos-latest)	1s
c / verifier / run (ubuntu-latest)	59s
c / ccpp / regular-tests (windows-latest)	42s
c / default / regular-tests (windows-latest)	42s
c / zephyr / zephyr-tests	58s
py / py-tests / regular-tests (ubuntu-latest)	45s
rs / rs-benchmark-tests / benchmark-tests	56s
py / py-tests / regular-tests (macos-latest)	1s
rs / rs-tests / regular-tests (ubuntu-latest, stable)	43s
py / py-tests / regular-tests (windows-latest)	42s
rs / rs-tests / regular-tests (macos-latest, stable)	1s
ts / benchmarking / benchmark-tests	49s
rs / rs-tests / regular-tests (windows-latest, stable)	40s
ts / ts-tests / regular-tests (ubuntu-latest)	43s
ts / ts-tests / regular-tests (macos-latest)	1s
ts / ts-tests / regular-tests (windows-latest)	41s
	17m 32s

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