Filter out unhealthy workloads

[hzxuzhonghu]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #693

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 26.08696% with 17 lines in your changes missing coverage. Please review.

Project coverage is 53.23%. Comparing base (9bef054) to head (c5b6f8d). Report is 96 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/controller/workload/workload_processor.go	26.08%	15 Missing and 2 partials :warning:

Files with missing lines	Coverage Δ
pkg/controller/workload/workload_processor.go	66.83% <26.08%> (-1.97%)	:arrow_down:

... and 9 files with indirect coverage changes

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[LiZhenCheng9527]

/lgtm

[kmesh-bot]

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[hzxuzhonghu]

@LiZhenCheng9527 Can you take another look

[LiZhenCheng9527]

/lgtm