Update test-resources MIMIC synthetic data

[will-pang]

Description

• Jira Ticket: MP-26

A very small PR to update the synthetic data for MIMIC-4, especially as we're trying to be more careful with data leakage in multimodal tasks.

We're hoping to use this standardized task setup found in multimodal_mimic.py base task.

Overview of Changes

• Update test-resources/core/mimic4demo/note/discharge.csv: Added a note for subject 10003 during admission id 20006 which notes that the patient passed away. If our task setup is correct, this should not appear in the training set because it leaks the outcome for mortality prediction
• Update test-resources/core/mimic4demo/hosp/diagnoses_icd.csv: Added an ICD-10 code for subject 10003 during admission id 20006 with ICD-10 code R99 which codes for Ill-defined and unknown cause of mortality. If our task setup is correct, this should not appear in the training set because it leaks the outcome for mortality prediction

Testing Notes

• Tested in examples/multimodal_mimic4_task_tutorial.ipynb for members who have a MORTALITY_LABEL = 1 as the outcome to make sure that we don't leak the note data that indicates a member passed away

[joshuxchn]

lgtm!