Backport of Gateway Test HTTPPathRewrite into release/1.15.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #16418 to be assessed for backporting due to the inclusion of the label backport/1.15.

WARNING automatic cherry-pick of commits failed. Commits will require human attention.

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The below text is copied from the body of the original PR.

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Description

Depends on the work done here #16278, ports the additional test HTTPPathRewrite, plus adds some helper functions to run the test cases.

Testing & Reproduction steps

go test ./...

Links

Original gateway e2e test

PR Checklist

• [X ] updated test coverage
• external facing docs updated
• [X ] not a security concern

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Overview of commits

• 9503082 - c1444b5 - f55710d

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• sarahalsmiller
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[github-team-consul-core-pr-approver]

Auto approved Consul Bot automated PR