Retroactively adding a state to a patient program before the current enrollment date should update the PatientProgram enrollment Date

https://github.com/openmrs/openmrs-module-htmlformentry/blob/761a3b1c1d57be0fdd158092f8c7cf2d9ab5b1b7/api-tests/src/test/java/org/openmrs/module/htmlformentry/WorkflowStateTagTest.java#L394-L452

 This also occurs in this unit test: https://github.com/openmrs/openmrs-module-htmlformentry/blob/761a3b1c1d57be0fdd158092f8c7cf2d9ab5b1b7/api-tests/src/test/java/org/openmrs/module/htmlformentry/WorkflowStateTagTest.java#L547-L594

Shows a use case where a patient is enrolled in a program and then retroactively placed in another state in that program workflow. The program enrollment date remains the original date from when the first enrollment occurs, rather than being extended to include the added states startDate.