need a studio widget support for jdbc driver choose field :

<Mapping
             mapFieldType="MODULE_LIST"
             name="widget.type.moduleList"
             widgetType="widget.type.moduleList">
       </Mapping>

From the code in WidgetTypeMapper in studio code for tck integration, not support use MODULE_LIST for jdbc driver choose in tck. So a feature. And another issue then: How to make it works for cloud?
https://github.com/Talend/tdi-studio-se/blob/b2418a7fa884a93613a2f0ea4298ae2e37b6735e/main/plugins/org.talend.sdk.component.studio-integration/src/main/java/org/talend/sdk/component/studio/model/parameter/WidgetTypeMapper.java#L44

And at runtime, we will use some inside maven dependency resolver to load that driver classes.

About cloud, cloud platform also need to provide a new ui widget for setting jar maven gav/path which exists in its .m2. Or a text table is enough, user need to set the path string self instead of choosing in a list. Also need to support new widget for tck : "Module", which help studio to decide ui(sure cloud platform no that now).