Should simple builds like imagepuller and operator be updated to use the simpler webhook logic of:

	JobSharedUtils.enableDefaultPipelineWebhookTrigger(delegate, SOURCE_BRANCH, SOURCE_REPO)

?

Also: review other jobs, make sure the webhooks are correctly coinfigured for watching the correct upstream repo/branches.

For example in the theia-sources job, it says:

Since this build depends on multiple upstream repos (eclipse theia, che-theia), this build is configured...

but the polling rule is different, so the description should be changed/removed.

related: CRW-2905