[release-1.0] Allow probes to explicitly set the port to the containerPort (#8288)

[knative-prow-robot]

This is an automated cherry-pick of #12225

Allow setting TCP and HTTP port to be equal to containerPort on readiness and liveness probes.

[codecov]

Codecov Report

Merging #12270 (2806e02) into release-1.0 (f1e419a) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@               Coverage Diff               @@
##           release-1.0   #12270      +/-   ##
===============================================
- Coverage        87.44%   87.41%   -0.03%     
===============================================
  Files              196      196              
  Lines             9614     9626      +12     
===============================================
+ Hits              8407     8415       +8     
- Misses             930      933       +3     
- Partials           277      278       +1     

Impacted Files	Coverage Δ
pkg/apis/serving/fieldmask.go	95.07% <100.00%> (+0.03%)	⬆️
pkg/apis/serving/k8s_validation.go	93.50% <100.00%> (+0.19%)	⬆️
pkg/autoscaler/scaling/multiscaler.go	87.27% <0.00%> (-1.82%)	⬇️
pkg/reconciler/configuration/configuration.go	84.61% <0.00%> (-1.54%)	⬇️
pkg/autoscaler/statforwarder/leases.go	75.53% <0.00%> (-1.44%)	⬇️
pkg/http/response_recorder.go	100.00% <0.00%> (ø)
pkg/reconciler/revision/background.go	93.20% <0.00%> (+1.94%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f1e419a...2806e02. Read the comment docs.

[dprotaso]

/retest

[dprotaso]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, knative-prow-robot

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/apis/OWNERS [dprotaso]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[dprotaso]

/test pull-knative-serving-unit-tests

hmmm...

=== RUN   TestReconcileWithCollector 
metric_test.go:217: CreateOrUpdate() called 0 times, want non-zero times   
FAIL: TestReconcileWithCollector (5.27s)

[dprotaso]

/retest