Bring back a modified ISBN check and add more tests

[AbdAlRahmanGad]

Closes #8885

• I placed the modified ISBN check below this statement
  

  jabref/src/main/java/org/jabref/logic/database/DuplicateCheck.java

  Line 334 in 6789460

  if (haveDifferentEntryType(one, two) ||

  
  to ensure that the types are the same first.
• Added 2 tests.

Mandatory checks

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[koppor]

Thank you for the follow-up. Small comment remaining.

[koppor]

I would flip List.of and Objects.equals, because oneISBN is checked in line 347 and then the subsequent line 348 is closer. Otherwise, the condition is harder to read, because it switches between ISBN, types, and ISBN.