box: export IPROTO constants and features to Lua

Export IPROTO constants and features to Lua: for now, simply copy-paste all
constants from `src/box/iproto_{constants, features}.h` — it would be nice
to generate them in the future (#7103).

Closes #7894

@TarantoolBot document
Title: export IPROTO constants and features to Lua
or the API description and usage exmaples, see:
* [design document](https://www.notion.so/tarantool/box-iproto-override-44935a6ac7e04fb5a2c81ca713ed1bce#dcaf854d2a9f4743ae25661c16528523);
* tarantool/tarantool#7894.