Remove deprecated CSV files and update experiment seeding scripts

- Deleted unused CSV files: 'meyer experiments.csv' and 'phase_2_experimental_run_sheet.csv'.
- Updated SQL seed scripts to reflect changes in experiment data structure and ensure consistency with the latest experiment parameters.
- Enhanced user role assignments in the seed data to include 'conductor' alongside 'data recorder'.
- Adjusted experiment seeding logic to align with the corrected data from the CSV files.

management-dashboard-web-app/supabase/seed_04_phase2_jc_experiments_updated.sql

@@ -370,3 +370,4 @@ CROSS JOIN generate_series(1, 3) AS rep_num
 WHERE e.experiment_number BETWEEN 1 AND 20
 AND e.phase_id = (SELECT id FROM public.experiment_phases WHERE name = 'Phase 2 of JC Experiments')
 ON CONFLICT DO NOTHING;
+