Revert "Fix passing labels to Gerrit when they are not defined in All-Projects"
That changed Zuul to send gerrit review with --label verified=1
which causes a SQL backend error on our side (T106596). It should be
upper case first Verified but setting that in the layout.yaml file
causes approval to no more matches cause they are made against a lower()
Revert back to passing --code-review and --verified, that will let us
switch back our layout.yaml file back to all lower case which fits the
approval matching rules.
This reverts commit c387a5043e9db2ec87699ea5fd2b08b40d12e882.