CloneSet supports to calculate scale number excluding Pods in PreparingDelete

[FillZpp]

Signed-off-by: FillZpp FillZpp.pub@gmail.com

Ⅰ. Describe what this PR does

CloneSet supports to calculate scale number excluding Pods in PreparingDelete.

Now It provides two ways to enable it:

1. Commandline flag --cloneset-scaling-exclude-preparing-delete which will enable for all CloneSets in the cluster.
2. CloneSet label apps.kruise.io/cloneset-scaling-exclude-preparing-delete: "true" which will only enable for the CloneSet itself.

[codecov-commenter]

Codecov Report

Merging #1024 (dcf5358) into master (c29b0c1) will increase coverage by 0.14%.
The diff coverage is 64.86%.

❗ Current head dcf5358 differs from pull request most recent head 5469c11. Consider uploading reports for the commit 5469c11 to get more accurate results

@@            Coverage Diff             @@
##           master    #1024      +/-   ##
==========================================
+ Coverage   49.63%   49.78%   +0.14%     
==========================================
  Files         124      124              
  Lines       12078    12091      +13     
==========================================
+ Hits         5995     6019      +24     
+ Misses       5167     5154      -13     
- Partials      916      918       +2     

Flag	Coverage Δ
unittests	49.78% <64.86%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/controller/cloneset/sync/cloneset_scale.go	26.66% <0.00%> (+0.92%)	⬆️
...kg/controller/cloneset/sync/cloneset_sync_utils.go	89.74% <96.00%> (+2.70%)	⬆️
pkg/controller/uniteddeployment/revision.go	66.41% <0.00%> (-1.53%)	⬇️
...g/webhook/pod/validating/pod_unavailable_budget.go	64.17% <0.00%> (-0.91%)	⬇️
pkg/controller/daemonset/daemonset_util.go	57.85% <0.00%> (-0.84%)	⬇️
pkg/controller/cloneset/cloneset_event_handler.go	78.68% <0.00%> (-0.78%)	⬇️
...tentpodstate/persistent_pod_state_event_handler.go	0.00% <0.00%> (ø)
pkg/control/pubcontrol/utils.go
pkg/control/pubcontrol/pub_control_utils.go	51.78% <0.00%> (ø)
... and 2 more

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[furykerry]

/lgtm

[FillZpp]

/approve

[kruise-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FillZpp

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