New config schema data type: bytes

Problem/Motivation

There are a number of places in Drupal core and contrib have configuration that specifies a certain amount of bytes: from memory limits to maximum file sizes, to minimum file sizes, to upload limits, and so on.

In Drupal core there are at least two use cases:

1. type: editor.editor.* has a image_upload.max_size key — used to indicate max image file size
2. type: base_file_field_field_settings has a max_file_size key — used to indicate the max file size for file fields

There's lots of contrib use cases for this too — I spotted one in Webform for example.

Steps to reproduce

N/A

Proposed resolution

1. A new type: bytes
2. A new CallbackValidator callback: \Drupal\Component\Utility\Bytes::validateConstraint()

Remaining tasks

Review.

User interface changes

None.

API changes

Two API additions:
No changes, but 2 API additions:

1. A new type: bytes config schema type, see CR: https://www.drupal.org/node/3416738. (We'll be able to use that for base_file_field_field_settings.max_filesize too. There's lots of contrib use cases for this too — I spotted one in Webform for example.
2. 👆 that required adding \Drupal\Component\Utility\Bytes::validateConstraint()

Data model changes

None.

Release notes snippet

None.