Create a new ListableTracker ctor taking a tracker.Interface

[mattmoor]

I noticed in a few places downstream that reconcilers were creating multiple trackers, which seems superfluous. As part of examining the way we use the tracker, I'm experimenting with changing this to just take a tracker.

/kind cleanup

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

NewListableTracker is deprecated, use NewListableTrackerFromTracker instead.

Docs

[mattmoor]

PSA: I'm opening this to survey what breaks, I don't plan to check this in as-is.

This is in a similar vein to: knative/pkg#2220

EDIT: I've updated this to be in a form we can check in (deprecate the old method)

[codecov]

Codecov Report

Merging #5651 (5f54e95) into main (3e584ed) will decrease coverage by 0.01%.
The diff coverage is 87.50%.

@@            Coverage Diff             @@
##             main    #5651      +/-   ##
==========================================
- Coverage   82.73%   82.71%   -0.02%     
==========================================
  Files         200      200              
  Lines        6266     6267       +1     
==========================================
  Hits         5184     5184              
- Misses        750      751       +1     
  Partials      332      332              

Impacted Files	Coverage Δ
pkg/duck/listable.go	81.94% <50.00%> (-1.16%)	⬇️
pkg/reconciler/broker/controller.go	88.88% <100.00%> (ø)
pkg/reconciler/broker/trigger/controller.go	92.10% <100.00%> (ø)
pkg/reconciler/channel/controller.go	100.00% <100.00%> (ø)
pkg/reconciler/parallel/controller.go	100.00% <100.00%> (ø)
pkg/reconciler/sequence/controller.go	100.00% <100.00%> (ø)
pkg/reconciler/subscription/controller.go	100.00% <100.00%> (ø)

---

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 3e584ed...5f54e95. Read the comment docs.

[knative-metrics-robot]

The following is the coverage report on the affected files.
Say /test pull-knative-eventing-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/duck/listable.go	88.7%	87.0%	-1.6

[mattmoor]

/assign @n3wscott

[n3wscott]

/lgtm
/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mattmoor, n3wscott

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:

• OWNERS [n3wscott]

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