ci: streamline CI actions to prepare for merge queue introduction #21

Job	Run time
build-freebsd	31m 44s
build-linux-pr (dev, x86_64-unknown-linux-gnu)	10m 45s
build-all-features (x86_64-unknown-linux-gnu)	3m 41s
build-linux-pr (dev, armv7-unknown-linux-gnueabihf)	1m 26s
build-linux-master	0s
build-linux-pr (dev, aarch64-linux-android)	1m 28s
build-linux-pr (release, x86_64-unknown-linux-gnu)	3m 4s
build-linux-stable	0s
build-linux-pr (release, armv7-unknown-linux-gnueabihf)	1m 56s
build-linux-pr (release, aarch64-linux-android)	2m 27s
build-windows-master	0s
build-macos (x86_64-apple-darwin, dev)	14m 8s
build-windows-pr (x86_64-pc-windows-msvc, dev)	14m 44s
build-macos (x86_64-apple-darwin, release)	2m 52s
build-windows-pr (x86_64-pc-windows-msvc, release)	4m 12s
build-windows-stable	0s
build-macos (aarch64-apple-darwin, dev)	1m 59s
check	46s
build-macos (aarch64-apple-darwin, release)	3m 53s
doc	4s
conclusion	1s
	1h 39m 10s

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