Replace deprecated sets usages with generic version

[ReToCode]

Changes

• Follow-up for Fixing all deprecated use of sets.String knative/pkg#2915
• Replaces all deprecated usages of sets with new generic versions

/kind cleanup

Partially knative/serving#14692

/hold networking would need to be merged first

[ReToCode]

/assign @dprotaso
/assign @skonto

[ReToCode]

/unhold

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (eca7f12) 80.98% compared to head (9ac3e7d) 80.98%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1182   +/-   ##
=======================================
  Coverage   80.98%   80.98%           
=======================================
  Files          18       18           
  Lines        1499     1499           
=======================================
  Hits         1214     1214           
  Misses        223      223           
  Partials       62       62           

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[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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