Deprecate `option` key for internal_events yaml

config/metrics/schema/internal_events.json

...nal_analytics/internal_event_instrumentation/migration.md

scripts/internal_events/cli/helpers/metric_options.rb

scripts/internal_events/cli/metric.rb

scripts/internal_events/cli/metric_definer.rb

...pts/internal_events/metrics/ee_total_28d_single_event.yml

...ipts/internal_events/metrics/ee_total_7d_single_event.yml

...scripts/internal_events/metrics/ee_total_single_event.yml

...s/internal_events/metrics/keyboard_smashed_metric_28d.yml

...ts/internal_events/metrics/keyboard_smashed_metric_7d.yml

...nternal_events/metrics/project_id_28d_multiple_events.yml

...internal_events/metrics/project_id_7d_multiple_events.yml

...es/scripts/internal_events/metrics/total_single_event.yml

...ipts/internal_events/metrics/user_id_28d_single_event.yml

...ripts/internal_events/metrics/user_id_7d_single_event.yml

spec/scripts/internal_events/cli_spec.rb