Dataloader instrumentation imports types from the underlying package

[rauno56]

instrumentation.d.ts of the build assets import types from dataloader:

import type [...] from 'dataloader';

Which means that the compilation fails, if the user has not installed the dataloader package - happens with metapackage users for example.

This needs to be fixed by removing all references to any of the dataloader types from the public APIs.

[rauno56]

@henrinormak, would you like to take it yourself or shall I?

[henrinormak]

Will be fixed by #1221, thanks for spotting and taking care of this! 🙇