Feature - Reformatting for linting, format and analysis with Mago - #174

- Make EventFeature::$event non-nullable and assign it explicitly
- Resolve GlobalAdapterFeature::getStaticAdapter through a coalesce chain
  and throw when no adapter is registered
- Make MasterSlaveFeature::$masterSql nullable and throw when the gateway
  has no Sql instance or postInitialize has not run
- Throw in SequenceFeature when a statement yields no result, when the
  sequence returns no usable value and when an insert exposes no arrays
- Interpolate the SequenceFeature sequence statements and search insert
  columns strictly
- Resolve the MetadataFeature table through getTable(), throw when it is
  not a named table, and take the primary key with reset()
- Extract RowGatewayFeature::primaryKeyFromMetadata(), flatten the
  prototype branches and throw when the gateway has no named table
- Replace the deprecated setArrayObjectPrototype() calls with
  setRowPrototype()

- Convert the Feature test methods to #[Test] attributes
- Use static:: assertions and strict comparisons throughout
- Hoist mock assignments out of the EventFeature call arguments
- Assert the MetadataFeature shared data by key rather than isset()
- Rename the TestTableGatewayFeature dispatch target to recordCall()
- Drop the Feature test entries from the lint baseline

- Test the MasterSlaveFeature Sql guards in postInitialize and postSelect
- Test the SequenceFeature result, sequence value and raw state guards
- Test the MetadataFeature named table guard and non-primary-key constraints
- Test the RowGatewayFeature table, feature set and primary key guards
- Test getFeatureByClassName skipping features of another class

- Point the RowGatewayFeature tests at the RowPrototypeResultSet helper
- Restore the AbstractTableGateway and Feature class size baseline entries
  dropped when the baselines were regenerated upstream