Closes the database connection behind a table retrieved with
get_cansim_connection(..., format="sqlite"). Parquet and feather connections hold no
connection to close and are left alone, so code that does not know which format it was handed
can close it either way.
Examples
if (FALSE) { # \dontrun{
con <- get_cansim_connection("34-10-0013", format="sqlite")
disconnect_cansim_connection(con)
} # }
