Workflow data structure changes lead to page display errors

[celeskyking]

Describe the bug
vela-apiserver is upgraded from 1.5.4 to 1.6.3, when i update workflow step using veluax , the page display is abnormal, and the workflow data cannot be saved normally. I found that the data structure of WorkflowStep and WorkflowStatus has changed from 1.5.x to 1.6.x, resulting in the data stored in mongo also changed, I tried to add a bson tag in the WorkflowStep and WorkflowStatus structure，and the page can be displayed normally

updated:

type WorkflowStep struct {
	WorkflowStepBase `json:",inline" bson:",inline"`
	SubSteps         []WorkflowStepBase `json:"subSteps,omitempty"`
}

type WorkflowStepStatus struct {
	StepStatus     `json:",inline" bson:",inline"`
	SubStepsStatus []StepStatus `json:"subSteps,omitempty"`
}

To Reproduce

update kubevela from 1.5.x to 1.6.x

Expected behavior

everything is ok

Screenshots

KubeVela Version
vela-core 1.5.3 ->1.6.3
vela-apiserver 1.5.4 -> 1.6.3
velaux 1.5.4 -> 1.6.3
database: mongo

Kubernetes Version
1.20.8

[barnettZQG]

/cc @chivalryq