avoid creating syntax nodes for jsdoc comment tags

[zhengbli]

This PR avoid creating syntax lists children for things in between jsdoc tags. It wasn't useful to keep them, and that way we don't need to skip them later.

[sandersn]

What bug does this fix?
Otherwise 👍 ... as far as I understand this code, which is not much.
(I recently ran into problems in this code in the new-jsdoc-parser-WIP branch, so if this doesn't fix them, I'll probably come ask you to explain what you know about it.)

[zhengbli]

This is a change based on #10407, which solves #9650 but still creates the synthetic nodes and skip them, so it does some unnecessary work.

Sure let me know if you have any questions.

[sandersn]

I tried this on the new jsdoc parser and things got a lot better. 👍 🎮