Linter allows overlapping statements

[caugner]

What type of issue is this?

Infrastructure issue

What is the issue?

The following Edge statement does not cause a Linter issue:

"edge": [
  {
    "version_added": "79"
  },
  {
    "version_added": "12",
    "partial_implementation": true
  }
]

What behavior were you expecting?

The Linter should fail, and suggest adding version_removed to the second statement.

Maybe this could be auto-fixable.

What version(s) of BCD is the issue present in?

• The current BCD release
• The current version of the main branch

Do you have anything more you want to share?

Noticed in #26542 (review).