chore: Add script to surface-scan components against specification (#9308)

* chore: Add script to surface-scan events against specification

* Fix problems identified by checks

* Add mechanism to skip checking unconverted internal events files

* Replace old check-events.sh script in CI

* Fix issues in `file` internal events

This caught issues I had left in after #9205

Signed-off-by: Bruce Guenter <bruce.guenter@datadoghq.com>