Increase e2e concurrency

[aledbf]

What this PR does / why we need it:

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Which issue/s this PR fixes

How Has This Been Tested?

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added tests to cover my changes.
• All new and existing tests passed.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

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Needs approval from an approver in each of these files:

• OWNERS [aledbf]

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[codecov-io]

Codecov Report

Merging #5298 into master will increase coverage by 0.02%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master    #5298      +/-   ##
==========================================
+ Coverage   58.61%   58.64%   +0.02%     
==========================================
  Files          88       88              
  Lines        6901     6901              
==========================================
+ Hits         4045     4047       +2     
+ Misses       2412     2410       -2     
  Partials      444      444              

Impacted Files	Coverage Δ
cmd/nginx/main.go	6.49% <0.00%> (ø)
internal/ingress/status/status.go	70.98% <71.42%> (ø)
internal/ingress/controller/store/store.go	59.65% <100.00%> (ø)
internal/k8s/main.go	65.45% <100.00%> (ø)
internal/task/queue.go	80.51% <0.00%> (+2.59%)	⬆️

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