Added 2 new filter methods, changed endpoint for get_facilities and r…

[arntog]

…enamed get_sources to get_facility_by_name. Changed the docstring endpoint paths

Pull Request Template

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Type of change

Please delete options that are not relevant.

• [X] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Manually tested the new and changed methods