Run tests under panic=abort #787

Job	Run time
minrust	1m 4s
stable (ubuntu-latest)	1m 7s
stable (macos-latest)	1m 19s
loom	18s
cross (i686-unknown-linux-gnu)	28s
stable (windows-latest)	3m 19s
miri	12m 19s
cross (armv7-unknown-linux-gnueabihf)	27s
nightly	56s
cross (powerpc-unknown-linux-gnu)	35s
panic=abort tests	17s
cross (powerpc64-unknown-linux-gnu)	39s
rustfmt	7s
tsan	1m 16s
cross (wasm32-unknown-unknown)	16s
Publish Documentation	17s
	24m 44s

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