E2E tests that verify symbolication pipeline

[lforst]

Background: We need a process to verify that the symbolication pipeline is still working after we do hybrid cloud migrations.

Goal

Write E2E test setup that:

• Builds a simple app
• Uploads source maps for that build
• Throws and captures error that is sent to Sentry
• Queries for that error and checks whether symbolication worked

Notes

• We already have something similar in the Next.js tests to verify whether dev errors are sent symbolicated. This is basically just copy paste work.