Some migrations not applied / not defined

[smarek]

• Table Table->newEntity() should be migrated to Table->newEmptyEntity(), validating that newEntity() did not originally contain any arguments / data for entity creation
• Paginator $this->Paginator->counter(['format' => __('format text')]) should be migrated to $this->Paginator->counter(__('format text'))
• Form public function buildValidator(Event $event, Validator $validator, $name) should be migrated to public function validationDefault(Validator $validator): Validator if the method validationDefault is not yet defined
• Form public function validate(array $data) should be migrated to public function validate(array $data): bool
• Form protected function _buildSchema(Schema $schema) should be migrated to protected function _buildSchema(Schema $schema): Schema
• Form public function getData($field = null) should get migrated to public function getData(?string $field = null)

        $this->paginate = [
            'order' => ['SomeTable.column'],
        ];

should be migrated to

        $this->paginate = [
            'order' => ['SomeTable.column' => 'asc'],
        ];

thus specifically providing order, if it was not provided before

[markstory]

Not all of these are doable with rector, but I can update the 40 rules for the ones we can automatically update.

[TomasVotruba]

@markstory I've checked them briefle and all can be automated.

[markstory]

Thanks for letting us know about that @TomasVotruba I'll circle back on this and figure out how to do the other changes.

[dereuromark]

We should probably close and open with a checklist of items not yet processed, so we can tick them off once done.