Change debbie to use gitea webhook instead of polling

[robe]

strk,

Now that GEOS is on gogs and we have gogs webhook installed on debbie's jenkins, can we as a firs step, change GEOS jobs to use Gogs web hook.

Right now it's using polling for running the jobs.

If that passes, then we can with PostGIS and GEOS investigate testing pull requests as well.

I'm not sure how web-hooks are setup on Gogs so not sure where to start.

[dbaston]

I actually like 5min polling....helps in the odd case where you forget to add a new file and then commit again right away.

[strk]

To account for the "forgot" case, my own mirroring script waits a configurable amount of seconds before starting the mirroring process, maybe the jenkins build configuration allows for something like that too ? I know for sure Buildbot did have support for that kind of building (ie: not all commits, but at a minimum time distance).

Anyway, it's also useful to test each and every commit (and reduce the number of commits by running "make check" locally)

[robe]

I think this I have part done and might be a dupe too.