[Breaking Change] Rule "ReferenceRedirection" treats "$ref" and equivalent primitive type as incompatible

In https://github.com/Azure/azure-rest-api-specs/pull/26658, check "Swagger BreakingChange" seems to think a "$ref" and the equivalent primitive type are incompatible:


```
// from
"properties": {
"kind": {
"type": "string",
"description": "The type discriminator describing a sub-type of QueueSelectorAttachment"
}
},

// to
"properties": {
"kind": {
"$ref": "#/definitions/QueueSelectorAttachmentKind",
"description": "The type discriminator describing a sub-type of QueueSelectorAttachment"
}
},

"QueueSelectorAttachmentKind": {
"type": "string",
"enum": [ "conditional", ... ],
"x-ms-enum": { "modelAsString": true,
```

Related: #7271