add variable `AERELNST` to dataset `ADAE`

[waddella]

Motivation

While developing the Patient profile module in TMC, we encountered multiple variables that were not present in random cdisc data (RCD) datasets and could be useful for future usage. See original issue.

Todo

In the function radae add the variables:

• AERELNST: Relationship to Non-Study Treatment

Update NEWS.md

Definition of done

• Check the definition of the variable in the GDSR
• If the variable has an associated codelist adhere to it (see GDSR)
• For possible values of variable, can search at stream manual
• Are there any related variables that show inconsistencies with your new variable, i.e. would the data pass the sdmtchecks (see https://github.roche.com/Rpackages/sdtmchecks)
• radae returns a tibble with the variables AERELNST
• Check that the documentation is updated
• Check the variable labels are present, use View(x) in RStudio
• Rerun vignettes/rebuild_cached_data.Rmd, and update the cached data

[shajoezhu]

Possible values for AERELNST include:

"CONCURRENT ILLNESS" "OTHER" "DISEASE UNDER STUDY" "NONE"

[shajoezhu]

dplyr::mutate(AERELNST = sample(
      x = c("CONCURRENT ILLNESS", "OTHER", "DISEASE UNDER STUDY", "NONE"),
      prob = c(0.3, 0.3, 0.3, 0.1),
      size = dplyr::n(),
      replace = TRUE
    ))