cmake: update nrniv_lib linking for SUNDIALS v3 submodule

- Use keyword signatures consistently in target_link_libraries
- Make SUNDIALS include directory PRIVATE + BUILD_INTERFACE only

Author: nrnhines

src/nrniv/CMakeLists.txt

@@ -455,9 +455,9 @@ endif()
 find_package(SUNDIALS REQUIRED)
 add_dependencies(nrniv_lib SUNDIALS)
 target_link_libraries(
-  nrniv_lib ${SUNDIALS_LIB_DIR}/libsundials_ida.a ${SUNDIALS_LIB_DIR}/libsundials_cvode.a
+  nrniv_lib PRIVATE ${SUNDIALS_LIB_DIR}/libsundials_ida.a ${SUNDIALS_LIB_DIR}/libsundials_cvode.a
   ${SUNDIALS_LIB_DIR}/libsundials_nvecpthreads.a ${SUNDIALS_LIB_DIR}/libsundials_nvecserial.a)
-target_include_directories(nrniv_lib PUBLIC ${SUNDIALS_INCLUDE_DIR})
+target_include_directories(nrniv_lib PRIVATE $<BUILD_INTERFACE:${SUNDIALS_INCLUDE_DIR}>)
 
 set_target_properties(nrniv_lib PROPERTIES EXPORT_NAME nrniv OUTPUT_NAME nrniv)
 target_compile_features(nrniv_lib PUBLIC cxx_std_17)