1.fix backend env bug;
2.fix s3 upload bug;
3.fix joint_inference bug;

Signed-off-by: JoeyHwong <joeyhwong@gknow.cn>

Signed-off-by: llhuii <liulinghui@huawei.com>

1. add 'push' to push gm/lc images
2. add 'push-examples' to push examples images
3. add 'push-all' for both

Signed-off-by: llhuii <liulinghui@huawei.com>