[Feature Request]: Consider parametrized removal of `Total number of deaths` and `Total number of patients withdrawn from study due to an AE` from output rows for `tm_t_events_summary()`

[m7pr]

Feature description

Multiple users requested such feature, in which those lines in tm_t_events_summary()

  layout_parent_list <- add_expr(
    layout_parent_list,
    substitute(
      expr = count_values(
        dthfl_var,
        values = "Y",
        .labels = c(count_fraction = "Total number of deaths"),
        .formats = c(count_fraction = format_count_fraction),
        denom = "N_col"
      ) %>%
        count_values(
          dcsreas_var,
          values = "ADVERSE EVENT",
          .labels = c(count_fraction = "Total number of patients withdrawn from study due to an AE"),
          .formats = c(count_fraction = format_count_fraction),
          denom = "N_col"
        ),
      env = list(dthfl_var = dthfl_var, dcsreas_var = dcsreas_var)
    )
  )

are non-mandatory and parametrized by logical flag to be removed or shown in the final output

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