New feature to use one project level variable as harness pipeline multi-choice input options. for example, make <+input>.allowedValues(<+variable.project_variable_X>) to be able to recognize the value of project level variable 'project_variable_X' and show them as options in input dropdown menu. The value of project level variable is like 'app-1,app-2,app-3'. As a result, the input drop down menu can show individual options 'app-1', 'app-2', and 'app-3' as multiple choices.