Disable comment attach in babel parser

[fisker]

Description

Ref babel/babel#13229

Checklist

• I’ve added tests to confirm my change works.
• (If changing the API or CLI) I’ve documented the changes I’ve made (in the docs/ directory).
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[fisker]

This seems not easy to disable, we use leadingComments in parser's postprocess, I tried to move it into printer's preprocess, then it breaks comment attach... Maybe take a deep look another time.