feat: add a new plugin trigger for detecting what the current deployment method is

This is currently used solely for reporting.

Closes #3047

plugins/20_events/bind-external-ip

@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
-source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
-
-[[ ! "$DOKKU_EVENTS" ]] || dokku_log_plugn_trigger_call "$(basename "$0")" "$@"

plugins/20_events/deploy-method

@@ -0,0 +1 @@
+hook