feat: spark contract (#377) #451

Job	Run time
ci-lint	17s
build-debug	4m 22s
build-2k	4m 22s
build-calibnet	4m 21s
build-forest	4m 46s
build-mainnet	4m 27s
gen-check	9m 31s
gofmt	23s
lint	3m 37s
mod-tidy-check	49s
setup-params	5s
test (test-itest-curio, ./itests/curio_test.go)	6m 33s
test (test-all, `go list ./... \| grep -v curio/itests`)	3m 13s
test (test-itest-harmonyDB, ./itests/harmonydb_test.go)	3m 27s
test (test-itest-alertnow, ./itests/alertnow_test.go)	1m 38s
	51m 51s

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