VarDCT block size selection tuning #12195

Job	Run time
vcpkg / x86-windows Release	8m 50s
linux x86_64 static	7m 22s
vcpkg / x64-windows Release	9m 52s
vcpkg / x64-windows-static Release	15m 39s
vcpkg / x64-windows-static Debug	7m 40s
.deb / ubuntu:22.04	23m 9s
.deb / debian:bullseye	12m 27s
.deb / debian:trixie	11m 24s
.deb / debian:sid	11m 55s
.deb / debian:bookworm	12m 41s
.deb / ubuntu:20.04	13m 6s
vcpkg / x86-windows-static Release	8m 40s
.deb / ubuntu:24.04	23m 47s
Publish release assets	0s
	2h 46m 32s

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