openapi: Move `/messages/{message_id}` below endpoints with similar regex.
openapi: Move `/messages/{message_id}` below endpoints with similar regex.

openapi-core, the request validator has a bug due to which data type
of path parameters is not checked. Hence `/messages/{message_id}`
can match with `messages/matches_narrow`. So change the position of
of `message/{message_id}` after all such possible matches to avoid
errors.

See https://github.com/p1c2u/openapi-core/issues/226 for details.

rht/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,showell/zulip,showell/zulip,zulip/zulip,punchagan/zulip,kou/zulip,brainwane/zulip,brainwane/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,kou/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,zulip/zulip,brainwane/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,rht/zulip,andersk/zulip,zulip/zulip,eeshangarg/zulip,punchagan/zulip,zulip/zulip,kou/zulip,showell/zulip,brainwane/zulip,kou/zulip,showell/zulip,rht/zulip,showell/zulip,andersk/zulip,rht/zulip,punchagan/zulip,kou/zulip,andersk/zulip,andersk/zulip,brainwane/zulip,kou/zulip,hackerkid/zulip,eeshangarg/zulip,zulip/zulip,zulip/zulip,punchagan/zulip,showell/zulip,hackerkid/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,brainwane/zulip,showell/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,punchagan/zulip