ProjectItemLink does not provide InheritedItemTypeDefinition #12491
Description
Issue Description
The ProjectItemLink contract doesn't provide InheritedItemTypeDefinition (that concept is kept internal to MSBuild), this leads the ProjectItemInstance created based ProjectItemLink always has an empty ItemTypeDefinition list.
Because ProjectItemInstance computes metadata values based on direct metadata, item type definition and inherited item definition internally (not going through the Link layer), this missing link leads the metadata value from items created through msbuild expressions to be incorrect in the project cache mode.
To fix that, ProjectItemLink need have a new virtual method to allow the link side to provide this list. (It would be nicer if it also provides API for the link implementation side to read this list from project evaluation).
Steps to Reproduce
No log, this is a bug in contract design.
Expected Behavior
extension can provide InheritedItemTypeDefinitions.
Actual Behavior
The current contract does not.
Analysis
No response
Versions & Configurations
No response