[Issue] Refactor ResourceConnection.php

[m2-assistant]

This issue is automatically created based on existing pull request: #29341: Refactor ResourceConnection.php

---

Description (*)

Just the minor adjustment to improve the class readability.
This also introcuces const visibility and strict_types.

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes magento/magento2#<issue_number>

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[slavvka]

Hi @m2-assistant[bot]. Thank you for your report.
The issue has been fixed in #29341 by @lbajsarowicz in 2.4-develop branch
Related commit(s):

• 4a83bfb58f1a448cadb46cec8969682daad3a8f4
• fc67e95e51c20a4840c61bb469e920a151437d74

The fix will be available with the upcoming 2.4.1 release.