BatchRequest not working as expected

#### Description:
Pull with BatchRequest fails:

#### Steps to reproduce:
[Try the script here](https://burohappold.sharepoint.com/:u:/r/sites/BHoM/02_Current/12_Scripts/01_Issue/BHoM/HTTP_Toolkit/%2372BatchRequest.gh?csf=1&web=1&e=yXnvG5)
I think this line https://github.com/BHoM/HTTP_Toolkit/blob/6f94727e931ee93c3b55f4c4d983bb9cae9273db/HTTP_Adapter/AdapterActions/Pull.cs#L70
Should have `ActionConfig` as the input parameter not HTTPConfig.
Otherwise the Pull method drops through to the fallback method

**Edit:**
I did a quick test to make the change as described above. Pull with a BatchRequest just hangs...
Maybe the concurrent set up is not quite right for the method?

#### Expected behaviour:

#### Test file(s):