tm2

feat(go): bump go 1.20 to 1.21 #2533

Job	Run time
build (1.20.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	18s
build (1.20.x, amd64, linux, ./pkg/amino/cmd/goscan)	26s
build (1.20.x, amd64, linux, ./pkg/autofile/cmd)	4s
build (1.20.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	34s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	16s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	16s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	16s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	20s
test (1.20.x, _test.flappy)	13s
test (1.20.x, _test.pkg.amino)	1m 41s
test (1.20.x, _test.pkg.bft)	9s
test (1.20.x, _test.pkg.others)	12s
test (1.21.x, _test.flappy)	46s
test (1.21.x, _test.pkg.amino)	1m 51s
test (1.21.x, _test.pkg.bft)	3m 20s
test (1.21.x, _test.pkg.others)	3m 4s
upload-coverage	1s
	13m 47s

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