Stop using knative.dev/pkg/pool, use errgroup instead

[imjasonh]

knative/pkg#2556

cc @dprotaso

[knative-prow]

Welcome @imjasonh! It looks like this is your first PR to knative-sandbox/net-gateway-api 🎉

[knative-prow]

Hi @imjasonh. Thanks for your PR.

I'm waiting for a knative-sandbox member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[dprotaso]

/ok-to-test
/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, imjasonh

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• OWNERS [dprotaso]

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[codecov]

Codecov Report

Merging #339 (6af558f) into main (8b11425) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #339      +/-   ##
==========================================
- Coverage   16.55%   16.53%   -0.02%     
==========================================
  Files          21       21              
  Lines        3172     3175       +3     
==========================================
  Hits          525      525              
- Misses       2616     2619       +3     
  Partials       31       31              

Impacted Files	Coverage Δ
test/conformance/gateway-api/path.go	0.00% <0.00%> (ø)
test/conformance/gateway-api/percentage.go	0.00% <0.00%> (ø)
test/conformance/gateway-api/visibility.go	0.00% <0.00%> (ø)

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