Support Dump workload

[hzxuzhonghu]

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:
Fixes part of #214

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 8.69565% with 42 lines in your changes are missing coverage. Please review.

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Flag	Coverage Δ
unittests	30.85% <8.69%> (?)

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Files	Coverage Δ
pkg/controller/ads/ads_processor.go	79.51% <ø> (ø)
pkg/cache/v2/route.go	50.00% <0.00%> (ø)
pkg/controller/controller.go	0.00% <0.00%> (ø)
pkg/controller/client.go	65.11% <57.14%> (ø)
pkg/controller/workload/cache/workload_cache.go	66.66% <0.00%> (ø)
pkg/status/status_server.go	0.00% <0.00%> (ø)

[nlgwcy]

/lgtm
/approve

[kmesh-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: nlgwcy

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