Remove freezer code

[psschwei]

The container-freezer is being archived as discussed in knative-extensions/container-freezer#217, so this commit is to remove its code from the serving repo.

Release Note

Container-freezer has been sunset in Knative v1.10. 

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.12 🎉

Comparison is base (bb18a82) 86.15% compared to head (8a31cbe) 86.27%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13830      +/-   ##
==========================================
+ Coverage   86.15%   86.27%   +0.12%     
==========================================
  Files         199      198       -1     
  Lines       14796    14669     -127     
==========================================
- Hits        12747    12656      -91     
+ Misses       1747     1715      -32     
+ Partials      302      298       -4     

Impacted Files	Coverage Δ
pkg/deployment/config.go	100.00% <ø> (ø)
pkg/queue/sharedmain/handlers.go	0.00% <ø> (ø)
pkg/queue/sharedmain/main.go	0.86% <0.00%> (+0.02%)	⬆️
pkg/reconciler/revision/resources/deploy.go	90.13% <ø> (-0.18%)	⬇️
pkg/reconciler/revision/resources/queue.go	98.22% <ø> (-0.04%)	⬇️

... and 1 file with indirect coverage changes

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[psschwei]

/assign @dprotaso

[ReToCode]

/lgtm
/hold for @dprotaso to review

[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, psschwei, ReToCode

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• OWNERS [dprotaso,psschwei]

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[dprotaso]

/hold cancel