Internal function to parse the raw output from ADVAN-style functions
advan_parse_output(data, cmts = 1, t_obs, extra_t_obs = TRUE, regimen)
data
: simulation output datacmts
: number of compartmentst_obs
: observation timesextra_t_obs
: leave extra added dose times in dataset?regimen
: PKPDsim regimenData frame containing parsed simulation data