Add support for platform parameter in image push #998

Job	Run time
lint	5s
build	12s
integration-tests (integration-dind)	4m 19s
integration-tests (integration-dind-ssh)	1m 33s
unit-tests (3.10)	19s
unit-tests (3.11)	20s
integration-tests (integration-dind-ssl)	4m 36s
unit-tests (3.9)	28s
unit-tests (3.8)	33s
unit-tests (3.12)	19s
integration-tests (integration-dind)	4m 20s
integration-tests (integration-dind-ssl)	4m 33s
lint	5s
integration-tests (integration-dind-ssh)	1m 33s
build	12s
unit-tests (3.9)	28s
unit-tests (3.11)	20s
unit-tests (3.8)	33s
unit-tests (3.10)	19s
unit-tests (3.12)	19s
	25m 26s

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