chromiumDev: Add the missing setuptools dependency

The build was failing with:
```
[1625/39505] ACTION //components/schema_org:generate_schema_org_code(//build/toolchain/linux:clang_x64)
FAILED: gen/components/schema_org/schema_org_entity_names.h gen/components/schema_org/schema_org_entity_names.cc gen/components/schema_org/schema_org_property_configurations.h gen/components/schema_org/schema_org_property_configurations.cc gen/components/schema_org/schema_org_property_names.h gen/components/schema_org/schema_org_property_names.cc
python ../../components/schema_org/generate_schema_org_code.py --schema-file ../../third_party/schema_org/schema.jsonld --output-dir gen/components/schema_org --templates templates/schema_org_entity_names.cc.tmpl templates/schema_org_entity_names.h.tmpl templates/schema_org_property_configurations.cc.tmpl templates/schema_org_property_configurations.h.tmpl templates/schema_org_property_names.cc.tmpl templates/schema_org_property_names.h.tmpl
Traceback (most recent call last):
  File "../../components/schema_org/generate_schema_org_code.py", line 22, in <module>
    env = Environment(loader=PackageLoader('generate_schema_org_code', ''))
  File "/build/chromium-83.0.4100.3/components/schema_org/../../third_party/jinja2/loaders.py", line 222, in __init__
    from pkg_resources import DefaultProvider, ResourceManager, \
ImportError: No module named pkg_resources
```