ci: add lfx paths to CI path filters (#11212)

Changes to src/lfx were not triggering CI tests because the path
filters did not include lfx directories. This adds lfx paths to:
- python: triggers backend tests for any lfx changes
- docker: triggers docker tests when lfx changes
- components-changes: lfx components
- components: lfx components, custom, schema, graph
- workspace: lfx inputs