feat(hooks): Add support for project webhook url variables

mentioned in commit be2c29d8

mentioned in merge request gitlab-org/terraform-provider-gitlab!2610 (merged)

mentioned in merge request gitlab-org/cli!2291 (merged)

mentioned in merge request gitlab-org/terraform-provider-gitlab!2611 (closed)

mentioned in merge request gitlab-com/gl-infra/woodhouse!678 (merged)

mentioned in merge request gitlab-org/release-tools!4388 (merged)

mentioned in merge request fforster/gitlab-mcp!146 (merged)

mentioned in merge request gitlab-com/gl-infra/autolabels!83 (merged)

mentioned in merge request gitlab-com/gl-infra/ringctl!339 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!1141 (merged)

mentioned in merge request schober-server/kubernetes/images/gitlab-token-refresher!21 (merged)

mentioned in merge request ydkn/gitlab-runner-cleanup!41 (closed)

mentioned in merge request gitlab-com/gl-infra/oncall-robot-assistant!104

mentioned in merge request fforster/epic-update!14 (merged)

mentioned in merge request sickit/token-operator!15 (merged)

mentioned in merge request hojerdev/git-sync!64 (merged)

mentioned in merge request gitlab-org/container-registry!2558 (merged)