chore(amino): improve error readability #844

Job	Run time
build (1.20.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	22s
test (1.20.x, _test.flappy)	53s
build (1.20.x, amd64, linux, ./pkg/amino/cmd/goscan)	10s
test (1.20.x, _test.pkg.amino)	4m 34s
build (1.20.x, amd64, linux, ./pkg/autofile/cmd)	15s
test (1.20.x, _test.pkg.bft)	4m 59s
build (1.20.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	17s
test (1.20.x, _test.pkg.others)	5m 31s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	10s
test (1.21.x, _test.flappy)	36s
test (1.21.x, _test.pkg.amino)	3m 49s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	16s
test (1.21.x, _test.pkg.bft)	4m 33s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	10s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	18s
test (1.21.x, _test.pkg.others)	5m 19s
upload-coverage	6s
	32m 18s

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