Pass meta to containerop and pipeline

[gaoning777]

Pass the metadata from the component and pipeline to ContainerOp and Pipeline

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This change is 

[Ark-kun]

GitHub diff seems to be glitching for me, so I'll write my commentt here:

For TypeMeta.to_dict():

We could make the result the same as in component yaml by doing the serialization like this:

def to_dict(self):
    if self.properties:
        return {self.name: self.properties}
    else:
        return self.name

But I'm fine with whatever you decide to do.

[Ark-kun]

Apart from my last comments, this looks pretty good to me.

[gaoning777]

@Ark-kun I modified the TypeMeta to be serialized to both str and dict.

[hongye-sun]

/lgtm

[gaoning777]

/approve

[k8s-ci-robot]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gaoning777

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• sdk/OWNERS [gaoning777]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[Ark-kun]

/lgtm
/approve