Pre-calculate SquareBits and place them in a static array #2370

Job	Run time
make-build (ubuntu-latest)	48s
build-and-publish (ubuntu-latest)	53s
fast-tests (Debug, ubuntu-latest)	1m 15s
make-build (macos-latest)	1m 37s
build-and-publish (windows-latest)	1m 48s
long-running-tests (ubuntu-latest, LongRunning)	1m 37s
build-and-publish (macOS-latest)	1m 25s
fast-tests (Debug, windows-latest)	2m 23s
long-running-tests (windows-latest, LongRunning)	2m 46s
long-running-tests (macOS-latest, LongRunning)	4m 10s
other-tests (ubuntu-latest, Configuration)	59s
fast-tests (Debug, macOS-latest)	2m 46s
perft-tests (ubuntu-latest, Perft)	3m 24s
other-tests (windows-latest, Configuration)	1m 59s
fast-tests (Release, ubuntu-latest)	1m 34s
perft-tests (windows-latest, Perft)	4m 27s
winning-at-chess (ubuntu-latest, WinningAtChess_FixedTime)	4m 23s
fast-tests (Release, windows-latest)	2m 8s
other-tests (macOS-latest, Configuration)	1m 23s
perft-tests (macOS-latest, Perft)	7m 28s
fast-tests (Release, macOS-latest)	3m 49s
	53m 2s

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