Deserialize auto populated columns on Active Record object creation

[baarde]

Motivation / Background

Fixes #53435

This Pull Request has been created because values returned from the databases need to be deserialized as they may use a different format, such as PostgreSQL bytea "hex" format.

Detail

This Pull Request replaces #write_from_user with #write_from_database when assigning the auto populated values returned by the database.

Additional information

I don't like the fact that we access @attributes directly, but #reload does it too and it's the simplest solution.

Alternatives considered:

• Adding an ad-hoc _write_attribute_from_database method somewhere (ActiveRecord::AttributeMethods::Write?).
• Deserializing the value using attributes_builder.types[column].deserialize(value).

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Unrelated changes should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• Tests are added or updated if you fix a bug or add a feature.
• CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.