Move ExecutionContext, ExecutionContextFactory and ConstraintViolationBuilder from TypedData to Validation namespace

Problem/Motivation

Follow-up to #3375447: Create an UploadedFile validator and deprecate error checking methods on UploadedFileInterface the \Drupal\Core\TypedData\Validation\ExecutionContextFactory and \Drupal\Core\TypedData\Validation\ExecutionContext can be used by any RecursiveValidator implementation, and have no dependency on TypedData.

Steps to reproduce

Proposed resolution

Move these classes to the \Drupal\Core\Validation namespace and deprecate the old classes and services.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet