[JENKINS-20683] - A draft of collapsible triggers
Replaced config-triggers by hetero list.

Related to: https://issues.jenkins-ci.org/browse/JENKINS-20683
Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
[JENKINS-20683] - Restored default behavior of config-buildWrappers by default.
The new version uses legacy behavior by default, but the behavior can be switched by useHeteroList attribute. It allows to avoid duplication of resources (comrared to config-publishers implementation).

Related to: https://issues.jenkins-ci.org/browse/JENKINS-20683

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>