Copy-pasted code in engine

[Noremos]

Hello. During JSON type implementation, I encountered multiple code duplications in the engine. To simplify future work, I decided to create several PRs with proposed improvements. There are 3 of them:

1. putType and putDType merge Merge putDtype and putType; remove duplicated code #8610
2. Use a method for impure string allocation Move impure-related string allocation to helper methods #8609
3. More csb_repeat::getName usage Replace duplicated code with csb_repeat::getName function #8611

[asfernandes]

Why this issue for feature/bug if there are the pull requests (that is same thing as an issue) that already tracks the change?

[Noremos]

Why this issue for feature/bug if there are the pull requests (that is same thing as an issue) that already tracks the change?

I wanted to address the issue of copypasta code in general and track related PRs. If you think it's a bad idea, I'll close this issue.