Do not allow content type property aliases that conflict with IPublishedElement #14683
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Prerequisites
Description
It is currently possible to define content type properties with aliases that conflict with
IPublishedElement
properties - e.g.ContentType
andProperties
. This becomes a problem when ModelsBuilder creates strongly typed models:We're already trying to avoid this scenario in the server side validation. However, we're only testing for properties and methods defined on
IPublishedContent
.With this PR we also test properties from base interfaces like
IPublishedElement
. Now we can no longer create properties with clashing aliases:Note that the
TypeExtensions
changes in this PR have been copied over from similar changes in a V14 PR, thus adding more new extension methods than strictly necessary for this PR. This hopefully will make forward merging easier 😄