Fix to Return Similarity Scores Along with Records

[Saikiranbonu1661]

Description

Closes #5777

Type of change

• Improvement (change adding some improvement to an existing functionality)

How Has This Been Tested

Passes similar param in query method while fetching records and could see returning similarity score.

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• I confirm My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[frascuchon]

Thanks for your contribution @Saikiranbonu1661

I pushed some changes to keep the backward compatibility as much as possible. The similarity score will be returned only when a similarity search is applied. The rest of the searches/filters won't return any score.