some more renaming and refactoring

pus_tc/tmtcc_pus_tc_utility.py

pus_tc/tmtcc_tc_core.py

pus_tc/tmtcc_tc_gps.py

pus_tc/tmtcc_tc_image_handler.py

pus_tc/tmtcc_tc_packer_hook.py

pus_tc/tmtcc_tc_service23_sdcard.py

pus_tc/tmtcc_tc_service2_raw_cmd.py

pus_tc/tmtcc_tc_service8_func_cmd.py

tmtc_core