Telemetry: track failed builds and build bundler usage (#77943)
This:
- Tracks build failures as a separate event, `NEXT_BUILD_FAILED`
- Added `bundler` property to both `NEXT_BUILD_COMPLETED` and `NEXT_BUILD_FAILED`
- Requires a server-side update
Alternatives considered:
Considered adding a `success: boolean` property to the existing `EventBuildCompleted`. There are a few issues with this:
- Expands the semantics of the existing event. This may have unintended consequences if we don’t change how we report on these events to filter success state
- This event requires page paths and timing information from the compiler, neither of which are guaranteed to exist on failures
Test Plan:
- Added a syntax error to a module and built with `NEXT_TELEMETRY_DEBUG=1`. Verified the failure event is sent along with the bundler value
- Verified bundler values are now sent for webpack, rspack, and Turbopack on build successes
