Improve optimizer interface

[nick-zh]

To leverage all the information we have about a template, we should probably chance the interface from

OptimizerInterface::optimize(string $definition): string

to

OptimizerInterface::optimize(SchemaTemplateInterface $schemaTemplate): SchemaTemplateInterface

This way the optimizers can leverage all the information from a SchemaTemplateInterface to optimize the schema.
This will be a breaking change