bazel: decrease size of test summary
bazel: decrease size of test summary

Previously on CI there are so many tests that you have to scroll past
many successful test lines to find the last error. Now only the failing
tests are printed in the summary.

Signed-off-by: Keith Smiley <cadcacca0656fa2178c91a0e61e28374cd3a79c3@gmail.com>

envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy