duplicated code for creating latin hypercube

[simonpcouch]

tune_bayes()' functionality for processing a non-tune_result initial input:

https://github.com/tidymodels/tune/blob/f6300b1e2f3c97ef2a4f48e2aa62b8c64cb238ac/R/tune_bayes.R#L490-L499

Duplicates checks and grid generation from tune_grid()'s check_grid, which it drops into anyway.

https://github.com/tidymodels/tune/blob/f6300b1e2f3c97ef2a4f48e2aa62b8c64cb238ac/R/checks.R#L116