Update go version to 1.20 #954

Job	Run time
Determine Go toolchain version	9s
get-product-version	5s
generate-metadata-file	37s
Go 1.20.6 linux arm build	1m 34s
Go 1.20.6 linux arm64 build	1m 12s
Go 1.20.6 linux 386 build	1m 45s
Go 1.20.6 linux amd64 build	1m 20s
Go 1.20.6 freebsd 386 build	39s
Go 1.20.6 freebsd amd64 build	44s
Go 1.20.6 freebsd arm build	39s
Go 1.20.6 windows 386 build	35s
Go 1.20.6 windows amd64 build	39s
Go 1.20.6 netbsd 386 build	39s
Go 1.20.6 netbsd amd64 build	31s
Go 1.20.6 netbsd arm build	45s
Go 1.20.6 openbsd 386 build	29s
Go 1.20.6 openbsd amd64 build	36s
Go 1.20.6 openbsd arm build	42s
Go 1.20.6 solaris amd64 build	31s
Go 1.20.6 darwin amd64 build	1m 13s
Go 1.20.6 darwin arm64 build	1m 14s
Docker arm default release build	23s
Docker arm64 default release build	27s
Docker 386 default release build	30s
Docker amd64 default release build	27s
	18m 25s

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