logilab-database #99125 Add boolean to trigger COPY FROM [done]

Add a support copy from boolean to trigger the possibility of the SQL db to support COPY FROM. It may be used in some dataimport stores.

prioritynormal
typeenhancement
done in1.9.0
load0.200
load left0.000
closed by#b0d5342fa1ac Add a support copy from boolean, closes #99125