Move node link strategy from view to report

[jacodg]

It would be better to:

• Store the link strategy with the report instead of the view so link strategy can also be used when doing a rerun to find counterpart checkpoints to check whether they need to be stubbed or not
• Remove code in frontend to find counterpart node and call a backend api that will return the counterpart checkpoint for a report that is compared with another report for which the user selects a specific checkpoint. It will simplify the frontend and all code related to finding counterpart checkpoints based on a link strategy will be on one place

See also:

#314 (will be fixed when the above is done)
#593 (will be fixed when the above is done)
wearefrank/ladybug@4745616 (node link strategy was added to view)

[jacodg]

Backend code has been changed to store link method in report. Dropdown has been added to old GUI. Link method will be used when running a report and in the compare tab.

wearefrank/ladybug@e1a63b6

REST api still has to be changed to allow the new GUI to make use of the backend code to find counterpart checkpoints:

wearefrank/ladybug@e1a63b6#diff-3d280ea4d464a0a5a7d164b85aacd0d0c6a03a99293b6ae3fc0b00a01935c148R766