[Issue #3134] Add schedule for export-opportunity-data (#3135)

## Summary
Fixes #3134

### Time to review: 5 mins

## Changes proposed
Add a scheduler to run this task.

## Context for reviewers
Last bit of work for the export to run nightly.

infra/api/app-config/env-config/scheduled_jobs.tf

@@ -52,5 +52,11 @@ locals {
       schedule_expression = "cron(30 * * * ? *)"
       state               = "ENABLED"
     }
+    export-opportunity-data = {
+      task_command = ["poetry", "run", "flask", "task", "export-opportunity-data"]
+      # Every day at 4am Eastern Time during DST. 5am during non-DST.
+      schedule_expression = "cron(0 9 * * ? *)"
+      state               = "ENABLED"
+    }
   }
 }