tm2

feat: implement `gno mod tidy` #960

Job	Run time
test (1.20.x, _test.flappy)	25s
build (1.20.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	8s
test (1.20.x, _test.pkg.amino)	3m 39s
build (1.20.x, amd64, linux, ./pkg/amino/cmd/goscan)	16s
test (1.20.x, _test.pkg.bft)	4m 3s
build (1.20.x, amd64, linux, ./pkg/autofile/cmd)	9s
test (1.20.x, _test.pkg.others)	6m 18s
build (1.20.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	7s
test (1.21.x, _test.flappy)	1m 0s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	19s
test (1.21.x, _test.pkg.amino)	4m 49s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	12s
test (1.21.x, _test.pkg.bft)	4m 42s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	25s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	27s
test (1.21.x, _test.pkg.others)	5m 31s
upload-coverage	6s
	32m 36s

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