build

update to go 1.21.3 #2866

Job	Run time
prepare-binaries	10s
prepare-test	2m 40s
buildkit-edge	2m 9s
binaries (darwin/amd64)	2m 21s
binaries (darwin/arm64)	2m 3s
binaries (linux/amd64)	2m 58s
binaries (linux/arm/v6)	2m 9s
binaries (linux/arm/v7)	2m 17s
binaries (linux/arm64)	2m 48s
binaries (linux/ppc64le)	2m 59s
binaries (linux/riscv64)	2m 52s
binaries (linux/s390x)	2m 20s
binaries (windows/amd64)	2m 15s
binaries (windows/arm64)	2m 19s
test (docker, ./tests)	4m 19s
test (docker\+containerd, ./tests)	4m 39s
test (docker-container, ./tests)	4m 10s
test (remote, ./tests)	3m 56s
test (./..., 1)	4m 39s
release	28s
bin-image	0s
	54m 31s

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