Automatic merge from submit-queue

Prune examples and e2es per discussion on sig-testing

**What this PR does / why we need it**:
Prune k8petstore from examples and e2es per discussion on sig-testing

**Special notes for your reviewer**:
This can live elsewhere outside the main repository.  

**Release note**:

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/cc @jayunit100 @fejta @kubernetes/sig-testing-pr-reviews