Drop non-KIngress Conformance Tests

[dprotaso]

Description

Having these tests (using the gateway api directly) isn't necessary since we already have our KIngress tests which are ensuring we have the correct functionality. Plus it's a source of confusion

Changes

• Drop conformance tests that uses the gateway api directly
• drop issue template
• Update README.md

Closes

• Conformance test checklist for Contour #358
• Conformance test checklist for Istio #357
• Add TestIngressClass conformance test #353
• Add TestUpdate conformance test #352
• Add TestIngressTLS conformance test #351
• Add TestProbeHeaders conformance test #349
• EPIC - Implement each Knative Networking (Gateway API) conformance test #348
• EPIC - Contour tests #36
• EPIC - Istio tests #23

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso

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[dprotaso]

/assign @nak3

[codecov]

Codecov Report

Merging #424 (707aec3) into main (94c2bd2) will increase coverage by 56.31%.
The diff coverage is n/a.

❗ Current head 707aec3 differs from pull request most recent head 1f0de7b. Consider uploading reports for the commit 1f0de7b to get more accurate results

@@             Coverage Diff             @@
##             main     #424       +/-   ##
===========================================
+ Coverage   16.45%   72.76%   +56.31%     
===========================================
  Files          21        9       -12     
  Lines        3167      683     -2484     
===========================================
- Hits          521      497       -24     
+ Misses       2615      157     -2458     
+ Partials       31       29        -2     

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[nak3]

/lgtm