`tt run script.lua -- -h` arg parsing not as written in `--help`

tt version

Tarantool CLI version 2.11.0, linux/amd64. commit: a9d884f

tt run --help

Run Tarantool instance.
All command line arguments are passed to the interpreted SCRIPT. Options to process in the SCRIPT
are passed after '--'.

USAGE
  tt run [SCRIPT.lua [flags] [-- ARGS]]

FLAGS
  -h, --help   help for run

EXAMPLES
  
# Print current environment Tarantool version:

    $ tt run --version
    Tarantool 2.11.0-entrypoint-724-gd2d7f4de3
    . . .

# Run a script (which print passed arguments) with 3 arguments and 2 options:

    $ tt run script.lua a b c -- -a -b
    a b c -a -b

# Run a script, pass '-i' argument to it, and enter interactive mode after script execution:

    $ tt run -i script.lua -- -i
    -i
    Tarantool 2.11.0-entrypoint-724-gd2d7f4de3
    type 'help' for interactive help
    tarantool>

First '-i' option is parsed by 'tt run' and means 'enter interactive mode'. The second '-i'
is after '--', so passed to script.lua as is.

# Execute stdin:

    $ echo 'print(42)' | tt run -
    42

-- script.lua
print(table.concat(arg, ","))

tt run script.lua a b c -- -a -b # a,b,c,--,-a,-b

tt run -i script.lua -- -i
# --,-i
# Tarantool 3.5.0-0-g81b5335
# type 'help' for interactive help
# tarantool> 

# Can't pass `-h` flag to script (catched by tt)
tt run script.lua -- -h # tt run --help

Was broken in 2.1.1 https://github.com/tarantool/tt/commit/744a4c733d7affe3c573b15f55a20bb5731a9ed3

Reproduce the documented and failing tt run commands from the issue, especially tt run script.lua -- -h, and compare the arguments received by the Lua script. Trace the tt run argument-parsing entry point and add regression coverage showing that arguments after -- reach the script unchanged; done means the documented examples produce the stated results.