Update docs to use versioned migration class

doc/development/application_limits.md

doc/development/avoiding_downtime_in_migrations.md

doc/development/background_migrations.md

doc/development/cascading_settings.md

...evelopment/database/add_foreign_key_to_existing_column.md

doc/development/database/not_null_constraints.md

doc/development/database/rename_database_tables.md

doc/development/database/strings_and_the_text_data_type.md

doc/development/database/table_partitioning.md

doc/development/migration_style_guide.md

doc/development/prometheus_metrics.md

doc/development/sidekiq_style_guide.md

doc/development/single_table_inheritance.md

doc/development/sql.md