Migrate all functional jobs and gate to zuul v3.
We will have to migrate all other legacy jobs too later.
This patch do step 1 in the docs: Move Legacy Jobs to Projects.
Co-Authored-By: Dai Dang Van <daidv@vn.fujitsu.com>
Needed-By: If7dfc17ccc93cd5d99cc899abf7c7cbe08a738dd
Needed-By: I18b026fbfc1741ca397f36c8cbf24aa02c03f4b5
Change-Id: I5c230a5cdd9ee42eee218f84e678d4f155dfc953