Improving CLI - implement label filter for list deployments

[yubozhao]

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What changes were proposed in this pull request?

Does this close any currently open issues?

How was this patch tested?

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@11ae828). Click here to learn what that means.
The diff coverage is 11.11%.

@@            Coverage Diff            @@
##             master     #521   +/-   ##
=========================================
  Coverage          ?   56.22%           
=========================================
  Files             ?       89           
  Lines             ?     6440           
  Branches          ?        0           
=========================================
  Hits              ?     3621           
  Misses            ?     2819           
  Partials          ?        0

Impacted Files	Coverage Δ
bentoml/cli/deployment.py	36% <ø> (ø)
bentoml/yatai/yatai_service_impl.py	35.18% <ø> (ø)
bentoml/cli/aws_lambda.py	37.59% <ø> (ø)
bentoml/yatai/client/deployment_api.py	17.72% <ø> (ø)
bentoml/cli/aws_sagemaker.py	40.14% <ø> (ø)
bentoml/proto/deployment_pb2.py	100% <ø> (ø)
bentoml/cli/click_utils.py	59.15% <10.52%> (ø)
bentoml/deployment/store.py	37.14% <12.5%> (ø)

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