zlib: emits 'close' event after readable 'end'

Call the close method after readable 'end' so that 'close' will be
emitted afterwards.

Fixes: https://github.com/nodejs/node/issues/32023

PR-URL: https://github.com/nodejs/node/pull/32050


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>