The `path` property on `ClientRequest` was only validated at
construction time. Add a getter/setter so that the same
`INVALID_PATH_REGEX` check runs whenever `req.path` is reassigned,
preventing invalid characters from reaching `_implicitHeader()`.
PR-URL: https://github.com/nodejs/node/pull/62030
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Tim Perry <pimterry@gmail.com>