Structure_Engine: Update CellularSectionFromSection

[peterjamesnugent]

Description:

Unit tests for CellularSection methods are not passing. This is because they were updated but the Serialiser_Engine Serialise method for IBHoMObjects was changed (and the UTs were not updated to reflect that).

Steps to reproduce:

See test script.

Expected behaviour:

Unit Test should pass.

Test file(s):

https://burohappold.sharepoint.com/:u:/r/sites/BHoM/02_Current/12_Scripts/01_Issue/BHoM/BHoM_Engine/Serialiser_Engine/%233357-Cellular%20Section%20UT%20Fail.gh?csf=1&web=1&e=9YBTte