CMake: Export package name and 3rdparty flag for 3rd party libraries

Needed to get rid of warnings like

 CMake Warning at cmake/QtFindPackageHelpers.cmake:406
 (message): Could not find target Qt6::BundledLibYaml to query
 its package name. Defaulting to package name Qt6BundledLibYaml.
 Consider re-arranging the project structure to ensure
 the target exists by this point.

which were introduced with the integration
of dffcc2370e in qtbase.

This happened because we never set and exported the package names
for 3rd party bundled libs.
So export the package name as well as "is 3rd party lib" value.

Amends 6235f7fa62

Pick-to: 6.4
Task-number: QTBUG-104998
Change-Id: I25fc1ffef766198974025e0097bced1cca4dd28d
Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>

cmake/Qt3rdPartyLibraryHelpers.cmake

@@ -165,11 +165,20 @@ function(qt_internal_add_3rdparty_library target)
     set_target_properties(${target} PROPERTIES
         _qt_module_interface_name "${target}"
         _qt_package_version "${PROJECT_VERSION}"
+        _qt_package_name "${INSTALL_CMAKE_NAMESPACE}${target}"
+        _qt_module_is_3rdparty_library TRUE
+    )
+
+    set(export_properties
+        "_qt_module_interface_name"
+        "_qt_package_version"
+        "_qt_package_name"
+        "_qt_module_is_3rdparty_library"
     )
 
     set_property(TARGET ${target}
                  APPEND PROPERTY
-                 EXPORT_PROPERTIES "_qt_module_interface_name;_qt_package_version")
+                 EXPORT_PROPERTIES "${export_properties}")
 
     qt_internal_add_qt_repo_known_module(${target})
     qt_internal_add_target_aliases(${target})
@@ -183,7 +192,6 @@ function(qt_internal_add_3rdparty_library target)
         ARCHIVE_OUTPUT_DIRECTORY "${QT_BUILD_DIR}/${INSTALL_LIBDIR}"
         VERSION ${PROJECT_VERSION}
         SOVERSION ${PROJECT_VERSION_MAJOR}
-        _qt_module_is_3rdparty_library TRUE
         _qt_module_skip_depends_include TRUE
     )
     set_property(TARGET "${target}"