Fixes a bug with TDOuput=td_occup

Description

Fixes a bug with TDOuput=td_occup

The loading of the states was not correct in serial and parallel The code still does not run in state parallel with a start index larger than 1, so the option is deactivated.

A test is added to check the option.

Closes #533 (closed) Closes #575 (closed)

News snippet

Fixes a bug with TDOuput=td_occup with TDProjStateStart > 1

Checklist

• I have checked that my code follows the Octopus coding standards
• I have added tests for all the new features added in this request.