backport to 1.16: examples: Fix deprecations/warnings in configs (#13503)#14110

antoniovicente wants to merge 1 commit intoenvoyproxy:release/v1.16envoyproxy/envoy:release/v1.16from

antoniovicente:more_example_warnings_v1.16antoniovicente/envoy:more_example_warnings_v1.16Copy head branch name to clipboard