Property names/keys with more than 80 symbols get prefixed with question mark ?, and colon : gets wrapped onto the next line

Describe the bug

I have a YAML file like this:

services:
  Drupal\some\long\service\name\name\name\name\name\name\name\name\na\length_80:
    tags:
      - name: event_subscriber

  Drupal\some\long\service\name\name\name\name\name\name\name\name\nam\length_81:
    tags:
      - name: event_subscriber

And the formatter always changes it to the:

services:
  Drupal\some\long\service\name\name\name\name\name\name\name\name\na\length_80:
    tags:
      - name: event_subscriber

  ? Drupal\some\long\service\name\name\name\name\name\name\name\name\nam\length_81
  : tags:
      - name: event_subscriber

So, names/keys with a length of more than 80 symbols get prefixed with the question mark ?, and the colon : gets wrapped onto the next line.

Expected Behavior

The formatter should keep the original formatting.

Current Behavior

See above.

Steps to Reproduce

1. Create a YAML file with the content in the first code block.
2. Format the file.
3. See the wrong changes.

Environment

VS Code version: 1.81.1
Commit: 6c3e3dba23e8fadc360aed75ce363ba185c49794
Date: 2023-08-09T22:18:39.991Z
Electron: 22.3.18
ElectronBuildId: 22689846
Chromium: 108.0.5359.215
Node.js: 16.17.1
V8: 10.8.168.25-electron.0
OS: Linux x64 6.2.0-27-generic

Start by reproducing the formatter behavior in the vscode-yaml extension using the YAML example with 80- and 81-character keys. Trace the formatter entry point responsible for line wrapping and inspect how long mapping keys are emitted. Done means formatting preserves the key and colon on the same line without adding the ? prefix.