chore: update httpbin to httpbun

[Spazzy757]

What this PR does / why we need it:

This PR is moving from HTTPBin to HTTPBun in order to fix flaky E2E tests.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

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 unit and/or e2e tests to cover my changes.
• All new and existing tests passed.
• Added Release Notes.

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• CLI change
• API change
• UI change
• configuration schema change
• behavioral change
• change in non-functional attributes such as efficiency or availability, availability of a new platform
• a warning about a deprecation
• fix of a previous Known Issue
• fix of a vulnerability (CVE)

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• Tests
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• Fixes for unreleased bugs

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NONE

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[longwuyuan]

@Spazzy757 curious why the LANG and LC vars need to be removed from Dockerfile

[Spazzy757]

@Spazzy757 curious why the LANG and LC vars need to be removed from Dockerfile

@longwuyuan honestly haven't finished it yet, just getting it working first then will clean it all up 😅

[rikatz]

follow up for another PR: this repeats a lot. Maybe we should define httpBun as a real part of framework, and add this as a method or part of the "f" structure

[rikatz]

I cant remember, so asking: do we have TLS tests pointing to httpbin or echo? do we want to move those to httpbun as well?

[strongjz]

Does the backend matter?

If we can get rid of an image and move everything echo does to httpbun, I'm all for it. Another follow-up issue.

[Spazzy757]

@strongjz @rikatz Let me know what you think so far. I just am having issues moving the request smuggling test over for now as there seems to be some kind of network error. But not sure how important it is to get the E2E tests in

[rikatz]

/approve

This is a very welcome migration. Just make sure we are using that internal httpbun image as much as possible here, and we are good to go.

/hold
@strongjz and @tao12345666333 have the lgtm

[strongjz]

/lgtm
/unhold

Thanks for this @Spazzy757. This is a huge improvement to our e2e framework, removing unsupported images like httpbin.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: rikatz, Spazzy757, strongjz

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[longwuyuan]

@Spazzy757 , like this a lot. Looking forward to the framework PR