chore: fix impl to api name memory leak

[mxschmitt]

fixes #1602

[nay-kang]

I had face this memory leak for a week. thank you for fixing it.
but I'm confusing with this code:

• there is seems no call to from_maybe_impl function with visited argument
• it has no benift to create a visited inside this function. in the previous version the shared visisted argument could cache obj between calls to speed up but will cause memory leak.

so I guess if we can remove the visited argument. or using an instance attribute belongs to BrowserContext then we can close BrowserContext to relase memory.

and there has another code could cause memory leak playwright/_impl/_js_handle.py

@dataclass
class VisitorInfo:
    visited: Map[Any, int] = Map()
    last_id: int = 0

    def visit(self, obj: Any) -> int:
        assert obj not in self.visited
        self.last_id += 1
        self.visited[obj] = self.last_id
        return self.last_id

the visited attribute in the VisitorInfo is a class attribute, which will share between instance and will not release memory until reload the module.

all this code are belongs to the same commit:ed13a53281bc213e1a4341c50d47fbc65670288f

[mxschmitt]

I see one, see here.

Will create a follow-up with this potential VisitorInfo leak, thanks for pointing this out.

[nay-kang]

hi @mxschmitt ,you memtioned the from_maybe_impl function with visited argument call here

o[name] = self.from_maybe_impl(value, visited)

is a recursive call to himself, so I think it could run well without visisted argument