config/jobs: disalbe S3 log uploads, add conformance tests
config/jobs: disalbe S3 log uploads, add conformance tests

Now basic e2e tests are working (thanks SIG testing team!)
We'd like to add another test to run conformance.
And disable log S3 uploads, which was enabled for initial debugging
purposes.

Signed-off-by: Gyuho Lee <0fbd30d364d71722b926950b451cecd97b54fc29@amazon.com>

GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid,GoogleCloudPlatform/testgrid