TMSS-1082: move target attribute from SAP to pointing

...ss/tmssapp/schemas/common_schema_template/pointing-1.json

...ss/tmssapp/schemas/common_schema_template/stations-1.json

...emplate/Beamforming_(Complex_Voltages)_Observation-1.json

...bserving_strategy_template/HBA_single_beam_imaging-1.json

...strategy_template/IM_LBA_Survey_Strategy_-_3_Beams-1.json

...serving_strategy_template/LoTSS_Observing_strategy-1.json

...ing_unit_observing_strategy_template/Pulsar_timing-1.json

...g_strategy_template/Responsive_Telescope_HBA_LoTSS-1.json

...rt_Test_Beamformed_Observation_-_Pipeline_-_Ingest-1.json

...emplate/Short_Test_Observation_-_Pipeline_-_Ingest-1.json

...g_strategy_template/Simple_Beamforming_Observation-1.json

...nit_observing_strategy_template/Simple_Observation-1.json

...unit_observing_strategy_template/UC1_CTC+pipelines-1.json