[export-dep-as-jar] Include transitive target dependencies in export-dep-as-jar

[blorente]

Problem

There is currently no way for a tool consuming the output of export-dep-as-jar to know whether to traverse the transitive dependency graph of a target or not. The tool shouldn't do that when the target has strict_deps enabled.

Solution

Add a field to the ouput of the target, "source_dependencies_in_classpath". This field is the intersection between "modulizable targets" and "transitive dependencies", respecting strict_deps.

Result

The output for the target now has that field, called source_dependencies_in_classpath. Tools can use this field instead of targets when figuring out which targets need including in the classpath. No need to traverse targets now.

• Depends on [export-dep-as-jar] Respect strict_deps in libraries field #9145