Remove need for Playwright Cleanup Steps

[grahamlangford]

Motivation

• The cleanup steps (such as mod deletion) take a significant amount of runtime when running the Playwright tests
• We already have a cleanup cron job that runs daily

Acceptance Criteria

• Confirm the cron job is running reliably (see blocking issue)
  • Ensure that we know if the job has issues (i.e. set up a slack alert based on a log query if the job throws errors)
• Remove the related automatic cleanup steps in Playwright
  • The fixtures should no longer call methods to delete created mods.

[grahamlangford]

@fungairino is there any additional context you would like to add here?