regression test for the issue fixed in #4543

[ElvinEfendi]

What this PR does / why we need it:
This is to make sure the fix in #4543 is covered by test.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

[aledbf]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, ElvinEfendi

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 [ElvinEfendi,aledbf]

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

[aledbf]

/retest

[codecov-io]

Codecov Report

Merging #4548 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4548      +/-   ##
==========================================
- Coverage   59.38%   59.35%   -0.03%     
==========================================
  Files          89       89              
  Lines        6823     6823              
==========================================
- Hits         4052     4050       -2     
- Misses       2335     2336       +1     
- Partials      436      437       +1

Impacted Files	Coverage Δ
internal/ingress/metric/collectors/process.go	88.29% <0%> (-2.13%)	⬇️

---

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 63dfa2b...bbcf3dc. Read the comment docs.