feat(emx2-pyclient): Truncate table

[dtroelofsprins]

Is your feature request related to a problem? Please describe.
There are quite some use-cases where I need to delete all records from a table. Currently I first need to retrieve all data and then use the delete_records method.

Describe the solution you'd like
It would be nice if there is a method to truncate a table. Adding an extra parameter to the delete_records method to indicate deletion of all data could also be an option.

Describe alternatives you've considered
The current way of working, first get all the data and then delete it.

[erikzwart]

Did you consider to use a graphql query to truncate the table, as admin your have the option to truncate a table in the emx2 ui.

query 'mutation {truncate(tables:"Table1"){message}}'