PoC: MockWebServer based on Vert.x

[manusa]

Description

WIP Still working on this, but it seems that there is a viable solution with not that many breaking changes. However, it seems reasonable that this will deserve a major version change, or some tooling to help users upgrade.

Replaces the io.fabric8:mockwebserver module backend from OkHTTP to Vert.x.

Relates to:

• Move to use okhttp4 due to a bug on IPV6 based cluster #2632
• Update OKHTTP3 to v4.9.0 (v3.x -> v4.x) quarkusio/quarkus#14662
• Move to Vert.x HTTP Client #2764
• MockWebServer HTTP/2 full support #4193
• okhttp High Security Vulnerability in kubernetes-client 5.12.2 #4290
• Too old version of Okhttp #5449
• Upgrade okio-jvm dependency #5485
• Upgrade kubernetes-server-mock to okhttp4 mockwebserver to avoid vulnerability warning on old junit transitive dependency #5613
• decouple from okhttp(3)  quarkusio/quarkus#29520

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change
• Chore (non-breaking change which doesn't affect codebase;
  test, version modification, documentation, etc.)

Checklist

• Code contributed by me aligns with current project license: Apache 2.0
• I Added CHANGELOG entry regarding this change
• I have implemented unit tests to cover my changes
• I have added/updated the javadocs and other documentation accordingly
• No new bugs, code smells, etc. in SonarCloud report
• I tested my code in Kubernetes
• I tested my code in OpenShift

[rohanKanojia]

Build seems to be failing because tests haven't been updated to remove okhttp mockwebserver references

[manusa]

Build seems to be failing because tests haven't been updated to remove okhttp mockwebserver references

Maybe it wasn't clear by the description, but this is just WIP.
So far only the mockwebserver module has been changed. I still need to migrate some of the tests there to use a different HTTP client instead of OkHttp. The core ones have already been updated and prove that the Mock server preserves the behavior after removing OkHttp.

Once I finish with the initial module I'll start by sending a PR to update the tests from OkHttp to Vert.x while still preserving the OkHttp production code. This way, subsequent PRs will be easier to review since tests won't (shouldn't) need updating.

[sonarqubecloud]

Quality Gate failed

Failed conditions
B Maintainability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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