The types are different for `gerrit stream-events` and webhooks, so
switch to a fork of go-gerrit containing their definitions.
https://github.com/andygrunwald/go-gerrit/pull/189 is the upstream PR.
Change-Id: I24136af2f2cf5655f2a8278632a3b0f52aa6adcc
Reviewed-on: https://cl.snix.dev/c/snix/+/30544
Autosubmit: Florian Klink <flokli@flokli.de>
Tested-by: besadii
Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com>