zlib: fix memory leak for invalid input

Don’t toggle the weak/strong reference flag from the error
handler, that’s too confusing. Instead, always do it in the
code that handles the write call.

Fixes: https://github.com/nodejs/node/issues/22705

PR-URL: https://github.com/nodejs/node/pull/22713


Reviewed-By: James M Snell <jasnell@gmail.com>