infra: increase timeout for porch e2e tests

[justinsb]

We are hitting the default 10 minute timeout, possibly just because
they take time. Set a 20 minute timeout to match other tests.

Signed-off-by: justinsb [email protected]

[justinsb]

             exitCode: 1
             items:
               - image: gcr.io/kpt-fn/starlark:v0.2.1
Error:      -    stderr: '[error] : fail: could not find httpbin deployment'
            +    stderr: |-
            +      Status: Image is up to date for gcr.io/kpt-fn/starlark:v0.2.1
Error:             +      [error] : fail: could not find httpbin deployment
                 exitCode: 1
                 results:
                   - message: 'fail: could not find httpbin deployment'
FAIL

Maybe we do need #4113 , but it isn't deterministic...

/retest

[johnbelamaric]

Porch has been moved to nephio - you may want to disable these while we await code removal?

nephio-project/nephio#465

We have the e2e tests working there, but don't yet have them running as CI. But that's where all the new stuff is being done.

[efiacor]

Done
https://github.com/nephio-project/porch/blob/main/.github/workflows/porch-e2e.yaml#L60

[justinsb]

@mortent did you want to remove the code here so people don't get confused?

[justinsb]

Ooops, @mortent has pointed out to me he already did this (removed our copy of porch) in #4153

/close