Clean up warnings and associated docs #1819

Job	Run time
build-trace-tools / run (ubuntu-latest)	5s
unit-tests-multi / run (ubuntu-latest)	8s
fetch-lf / extract-ref	5s
build-trace-tools / run (macos-latest)	16s
build-rti / run (ubuntu-latest)	10s
unit-tests-multi / run (macos-latest)	17s
build-trace-tools / run (windows-latest)	18s
unit-tests-multi / run (windows-latest)	1m 4s
build-rti / run (macos-latest)	19s
unit-tests-single / run (ubuntu-latest)	15s
build-rti / run (windows-latest)	17s
unit-tests-single / run (macos-latest)	13s
unit-tests-single / run (windows-latest)	1m 14s
lf-default-zephyr / zephyr-tests	59m 41s
lf-default-arduino / arduino-tests (ubuntu-latest)	4m 44s
lf-default / regular-tests (ubuntu-latest)	29m 55s
lf-default-arduino / arduino-tests (macos-latest)	6m 0s
lf-adaptive / regular-tests (ubuntu-latest)	32m 53s
lf-default / regular-tests (macos-latest)	1h 17m 57s
lf-gedf-np / regular-tests (ubuntu-latest)	29m 26s
lf-adaptive / regular-tests (macos-latest)	1h 18m 59s
lf-gedf-np / regular-tests (macos-latest)	42m 4s
lf-default / regular-tests (windows-latest)	2h 14m 24s
lf-adaptive / regular-tests (windows-latest)	1h 45m 8s
lf-gedf-np / regular-tests (windows-latest)	1h 46m 41s
	11h 52m 33s

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