AllOf implementation alignement

[baywet]

From the discussions:

1. swap the ordering between this line and the one below
2. add opposite clauses with and !other.HasAnyProperty()
3. add todo comment to handle the case when all three of them have properties, and in which case squish inline and root, and make it inherit the reference entry.

kiota/src/Kiota.Builder/KiotaBuilder.cs

Line 1627 in d453905

(true, not null, not null) when inlineSchema.HasAnyProperty() => AddModelDeclarationIfDoesntExist(currentNode, schema, className, shortestNamespace, CreateInheritedModelDeclaration(currentNode, inlineSchema, operation, classNameSuffix, codeNamespace, isRequestBody, typeNameForInlineSchema)),