[5.x]: Copy/Paste nested entries inside matrix fields does not respect translation methods for fields

[wsydney76]

What happened?

Description

In a multi-site environment, "Copy" a nested entry with translated field in site A, "Paste" does not retain the translated field content, but uses the content from site A everywhere.

Steps to reproduce

1. Multi-site with two sites, en/de
2. Setup a matrix-field with an entry type containing a field with translation method per site/per language.
3. Create an entry with translated content for this field.
4. "Copy" nested entry when editing in site "EN"
5. "Paste" and switch to site "DE"
6. Result: The field has content from site "EN" instead from "DE"

Expected behavior

Translated content should be retained.

Actual behavior

The content from the site the "COPY" action was invoked is inserted to all sites.

Craft CMS version

Craft Solo 5.7.10

PHP version

8.3.21

Operating system and version

Linux 5.15.167.4-microsoft-standard-WSL2

Database type and version

MySQL 8.0.40

Image driver and version

Imagick 3.8.0 (ImageMagick 6.9.11-60)

Installed plugins and versions