Versionless CMake config files and targets create an incompatible dialect

# Make my life and my users life easier by making Qt version use unambiguous. 
# We have to use an ugly variable to save the existing state:
set(Grantlee6_existingState ${QT_NO_CREATE_VERSIONLESS_TARGETS})
set(QT_NO_CREATE_VERSIONLESS_TARGETS OFF)
find_dependency(Qt6Core REQUIRED)
# Unset this so that it doesn't leak
set(QT_NO_CREATE_VERSIONLESS_TARGETS ${Grantlee6_existingState})
unset(Grantlee6_existingState

add_library(Grantlee6::Templates SHARED IMPORTED)
set_property(TARGET Grantlee6::Templates PROPERTY 
    INTERFACE_LINK_LIBRARIES Qt6::Core
)

# Finds Qt6Core and defines versioned Qt6::Core but does not define versionless Qt::Core
find_package(Grantlee6)
# Has no effect because it has already been found (does not create versionless Qt::Core): 
find_package(Qt6Core)

add_executable(myexe main.cpp)
# Fails:
target_link_libraries(myexe Qt::Core)

# Finds Qt6Core and defines versioned Qt6::Core and versionless Qt::Core
find_package(Qt6Core)
# The internal find_package(Qt6Core) has no effect because it is already found:
find_package(Grantlee6)

add_executable(myexe main.cpp)
# Works:
target_link_libraries(myexe Qt::Core)

# Contains find_package(Qt6Core) but prevents versionless targets:
find_package(Foo)
# The find_package(Qt6Core) in BarConfig.cmake has no effect, but Bar::Core uses versionless Qt::Core in its INTERFACE_LINK_LIBRARIES.
# This will lead to failure at generate time.
find_package(Bar)

# Only needed to solve dialect problem in the Qt cmake files:
find_package(Qt6Core)

find_package(Foo)
find_package(Bar)