Renames nfapi_nr_srs_reported_symbol_t prgs into *reported_symbol_list for two reasons:
  So that the name is more representative of what the parameter represents.
  For it to actually be a list, and not assume only 1 reported symbol is used.

Allocate reported_symbol_list in unpack_nr_srs_beamforming_report.

Updated all references to prior prgs to point to the first position of reported_symbol_list, still only effectively using the first reported_symbol.

Rename fill_srs_reported_symbol_list into fill_srs_reported_symbol and update input parameter name, since it only fills the information related to one reported symbol