Cleaner error for `augment()` with survival models

[hfrick]

It'd be nice to get rid of the error messaging from purrr::map2() here and only get the error about the missing eval_time argument.

library(censored)
#> Loading required package: parsnip
#> Loading required package: survival

sr_fit <- survival_reg() %>% 
  fit(Surv(time, status) ~ ., data = lung)

augment(sr_fit, lung)
#> Error in `purrr::map2()`:
#> ℹ In index: 1.
#> ℹ With name: 1.
#> Caused by error in `.f()`:
#> ! argument "eval_time" is missing, with no default

^{Created on 2023-07-18 by the reprex package (v2.0.1)}

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