Feature Request: Hide a parameter from the annotation

Nobody has claimed this yet.

I have a table with a metatable assigned to it to implement inheritance. The metatable's `__index` metamethod intercepts a call to a function on the original table and gets the actual function from the "parent" table and then injects another parameter into the function call.

For example, the user would call the function like this: `tbl:Execute("hello", "world")` and the function would be implemented like this:

```lua
function ParentTable:Execute(data, hello, world)
-- data is a special parameter controlled by the metatable and is given a table value
-- hello is assigned "hello" and world is assigned "world"
end
```

The problem with this is that VS Code and LuaLS warns the user that they didn't provide a value to `data`. I have to use `@overload` to every single method to say you can call this method with just "hello" and "world" arguments provided.

I want to be able to tell LuaLS to completely hide/ignore the `data` parameter and pretend it doesn't exist; essentially moving all other parameter indexes down by 1 to fill the empty spot, so "hello" is recognized as parameter 1 and "world" as parameter 2.

Start by tracing how LuaLS handles function parameter annotations, @overload declarations, and calls intercepted through a metatable's __index metamethod. Done means LuaLS can hide the injected data parameter, shift the visible arguments, and stop warning when callers provide only hello and world.

Written by the indexing model from the issue text.