cmake: Fix assimp target install rule fully specifying component

This commit ensures generated install rules for the assimp target are
all consistently associated with components named after LIBASSIMP_COMPONENT
or LIBASSIMP-DEV_COMPONENT CMake variables.

It streamlines the packaging of specific components of assimp in client
projects leveraging the CPACK_INSTALL_CMAKE_PROJECTS variable.

Failing to do so leads to "/path/to/assimp-build/code/cmake_install.cmake"
file having install rules associated with a component called "Unspecified".

See https://cmake.org/cmake/help/v3.10/command/install.html#installing-targets
and https://cmake.org/cmake/help/v3.22/module/CPack.html#variable:CPACK_INSTALL_CMAKE_PROJECTS

code/CMakeLists.txt

@@ -1317,11 +1317,10 @@ ENDIF ()
 
 INSTALL( TARGETS assimp
   EXPORT "${TARGETS_EXPORT_NAME}"
-  LIBRARY DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-  ARCHIVE DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-  RUNTIME DESTINATION ${ASSIMP_BIN_INSTALL_DIR}
-  FRAMEWORK DESTINATION ${ASSIMP_LIB_INSTALL_DIR}
-  COMPONENT ${LIBASSIMP_COMPONENT}
+  LIBRARY DESTINATION ${ASSIMP_LIB_INSTALL_DIR} COMPONENT ${LIBASSIMP_COMPONENT}
+  ARCHIVE DESTINATION ${ASSIMP_LIB_INSTALL_DIR} COMPONENT ${LIBASSIMP-DEV_COMPONENT}
+  RUNTIME DESTINATION ${ASSIMP_BIN_INSTALL_DIR} COMPONENT ${LIBASSIMP_COMPONENT}
+  FRAMEWORK DESTINATION ${ASSIMP_LIB_INSTALL_DIR} COMPONENT ${LIBASSIMP_COMPONENT}
   INCLUDES DESTINATION ${ASSIMP_INCLUDE_INSTALL_DIR}
 )
 INSTALL( FILES ${PUBLIC_HEADERS} DESTINATION ${ASSIMP_INCLUDE_INSTALL_DIR}/assimp COMPONENT assimp-dev)