Downgrade ax_valgrind_check #400

Job	Run time
build-linux-glibc	56s
build-linux-glibc-arm	1m 55s
build-linux-glibc-arm64	2m 11s
build-linux-musl	1m 58s
build-linux-musl-arm64	2m 6s
build-linux-musl-arm	1m 25s
build-macos-arm64	2m 7s
build-macos-x64	3m 13s
build-windows	2m 57s
pack	25s
build-test-binaries	1m 30s
run-test-binaries-os-versions (centos:7)	30s
run-test-binaries-os-versions (debian:10)	29s
run-test-binaries-cross-plat (x64)	1m 11s
run-test-binaries-cross-plat (arm)	31s
run-test-binaries-cross-plat (arm64)	35s
	23m 59s

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