Fix performance tests setup

[gabo1208]

Fixes #6339

Proposed Changes

• 🐛 Fixes wrong value being used on the Sender Throughput graph (the latency values were being used)
• 🎁 Added right graphs to the plot plg file, included the latency and correct throughput values
• 🧹 Fixed Api versions on yamls (they were pointing to beta and alpha versions not included anymore on the releases)

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

Now the Eventing Performance tests are ready to use, including Sender Throughput  and latency graphs 

[codecov]

Codecov Report

Merging #6340 (a5c66d2) into main (5ede92d) will increase coverage by 0.20%.
The diff coverage is 58.13%.

@@            Coverage Diff             @@
##             main    #6340      +/-   ##
==========================================
+ Coverage   82.18%   82.39%   +0.20%     
==========================================
  Files         231      233       +2     
  Lines        7787    11565    +3778     
==========================================
+ Hits         6400     9529    +3129     
- Misses        937     1573     +636     
- Partials      450      463      +13     

Impacted Files	Coverage Δ
pkg/apis/sugar/store.go	12.50% <12.50%> (ø)
pkg/reconciler/sugar/namespace/namespace.go	68.96% <72.72%> (-4.37%)	⬇️
pkg/reconciler/sugar/trigger/trigger.go	68.96% <75.00%> (-2.47%)	⬇️
pkg/apis/sugar/sugar.go	90.47% <90.47%> (ø)
pkg/reconciler/sugar/namespace/controller.go	84.61% <100.00%> (+5.44%)	⬆️
pkg/reconciler/sugar/trigger/controller.go	62.79% <100.00%> (+7.23%)	⬆️
pkg/apis/flows/v1/register.go	69.23% <0.00%> (-10.77%)	⬇️
pkg/apis/eventing/v1/register.go	69.23% <0.00%> (-10.77%)	⬇️
pkg/apis/messaging/v1/register.go	73.33% <0.00%> (-10.00%)	⬇️
pkg/adapter/apiserver/filter.go	62.50% <0.00%> (-5.93%)	⬇️
... and 227 more

---

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[gabo1208]

/retest

[pierDipi]

/approve
/cc @salaboy @gab-satchi

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gabo1208, pierDipi

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• test/OWNERS [pierDipi]

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[salaboy]

/lgtm

[gabo1208]

/retest

[lionelvillard]

/retest-required