chore: add contract-contract interation with ownership example #1740

Job	Run time
build (1.20.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	12s
build (1.20.x, amd64, linux, ./pkg/amino/cmd/goscan)	4s
build (1.20.x, amd64, linux, ./pkg/autofile/cmd)	8s
test (1.20.x, _test.flappy)	24s
build (1.20.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	13s
test (1.20.x, _test.pkg.amino)	1m 32s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/aminoscan)	4s
test (1.20.x, _test.pkg.bft)	21m 13s
build (1.21.x, amd64, linux, ./pkg/amino/cmd/goscan)	9s
test (1.20.x, _test.pkg.others)	2m 36s
build (1.21.x, amd64, linux, ./pkg/autofile/cmd)	8s
test (1.21.x, _test.flappy)	22s
build (1.21.x, amd64, linux, ./pkg/iavl/cmd/iaviewer)	12s
test (1.21.x, _test.pkg.amino)	1m 30s
test (1.21.x, _test.pkg.bft)	2m 26s
test (1.21.x, _test.pkg.others)	2m 30s
upload-coverage	0s
	33m 43s

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