Update on "[build] Add editable mode unittest"

As titled. To do this we need to refactor the arguments being passed
into `setup-linux.sh` `setup-macos.sh` and `unittest-linux.sh`
`unittest-macos.sh`.

[ghstack-poisoned]

Author: larryliu0820

pyproject.toml

@@ -88,7 +88,6 @@ flatc = "executorch.data.bin:flatc"
 [tool.setuptools.package-dir]
 "executorch.backends" = "backends"
 "executorch.codegen" = "codegen"
-"executorch.data.bin" = "data/bin"
 # TODO(mnachin T180504136): Do not put examples/models
 # into core pip packages. Refactor out the necessary utils
 # or core models files into a separate package.