proto: Add PATCH method to RequestMethod enum (#6737)
proto: Add PATCH method to RequestMethod enum (#6737)

Signed-off-by: glebmish <glebmish@yandex-team.ru>

Mirrored from https://github.com/envoyproxy/envoy @ e294040ed7b99236463c0f4211895ebec3d3fe6a

lyft/envoy-api,lyft/envoy-api,lyft/envoy-api