Remove remaining use of deprecated headers in public api

https://github.com/apache/celix/blob/c0666d0ec501c54852198a18cf46eda69552ee50/bundles/remote_services/rsa_spi/CMakeLists.txt#L20-L26

	get_target_property(FRAMEWORK_SOURCE_DIR Celix::framework "SOURCE_DIR")
	target_include_directories(c_rsa_spi INTERFACE
	$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>
	$<BUILD_INTERFACE:${FRAMEWORK_SOURCE_DIR}/include_deprecated>##TODO remove when deprecated header service_reference.h is removed
	)
	set_property(TARGET celix-deprecated APPEND PROPERTY "FRAMEWORK_TARGETS" c_rsa_spi)
	target_link_libraries(c_rsa_spi INTERFACE Celix::framework)

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