Fix Tasks/Notes created with null position

[Weiko]

Fixes https://github.com/twentyhq/twenty/issues/8810 Fixes https://github.com/twentyhq/twenty/issues/5268 Fixes https://github.com/twentyhq/twenty/issues/8971

• Fixing Task/Note creation not sending position during creation
• Adding a command to backfill position being null, using existing backfill command.
• Removed unused backfill job.
• Updated workspace entities to set position non-nullable and set a default value to make it non-required on the API
• Updated position factory to set a default position for all objects having a POSITION field instead of only company/people
• Moved the try/catch in each resolver factory calling GraphqlQueryRunnerException handler, makes more sense to call it in the actual graphql-query-runner and removing some duplicate codes
• Adding validations for input in QueryRunnerArgs factories
• Allow sync-metadata to override and sync defaultValues for certain field types (that can't be updated by users)
• Removing health-check from sync-metadata command during force mode to improve performances