Delete endpoint inserter and id inserters

What does this MR do and why?

Delete endpoint inserter and id inserters

Delete usages and specs for the class

Update string translations

Screenshots or screen recordings

NA

How to set up and validate locally

1. The deleted files were not used anywhere except specs.
2. Pipeline should be 🍏

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #397139 (closed)