Draft: Enable integrated error tracking by default

What does this MR do and why?

When a new project is created, enable the integrated error tracking by default.

This behavior is behind a feature flag: enable_integrated_error_tracking_by_default

Feature flag rollout issue: #352395 (closed)

#ceo-interest #incubation-engineering #group-respond

To do

• Test plan
  • Should respect FF state
  • Should enable integrated error tracking by default
  • Existing projects with sentry based error tracking should be unaffected
• #6295 (moved) performance incident related to error tracking :: sentry
  • Review impact of this MR on performance

Screenshots or screen recordings

Original Behavior	New Behavior
original-behavior	new-behavior

How to set up and validate locally

1. Enable the feature flag enable_integrated_error_tracking_by_default
2. Create a new project
3. Verify that integrated error tracking is enabled by default
   • Either in Monitor :: Error Tracking
   • Or in Settings :: Monitor

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.