Tasks: disappearing comment when editing a task

[Cubone21]

When editing a task and adding a comment into it, it won't save. It can save a comment only when creating a new task but after any kind of editing of the task the comment disappears.

[drdelambre]

seems to work now, reopen if its still broken

[genehynson]

Verified this is still broken @russorat can you assign a severity?

[genehynson]

After fixing this bug, make sure to re-enable this test: https://github.com/influxdata/ui/blob/master/cypress/e2e/shared/tasks.test.ts#L350

[kristinarobinson]

Blocked by https://app.zenhub.com/workspace/o/influxdata/idpe/issues/10368.