Add support for new src/tbl class in DB simulations

[edgararuiz-zz]

Adding support in the dbplyr::simulate_###() functions of the new src/tbl class that is being passed in the dev version of dbplyr will allow us to adds test to the customizations (ref: tidyverse/dbplyr@81419ca)

Using a PR's version of dbplyr, this should be using MINUS instead of EXCEPT:

library(dplyr, warn.conflicts = FALSE)
packageVersion("dbplyr")
#> [1] '1.2.1.9001'
lf1 <- dbplyr::lazy_frame(x = 1:4, src = dbplyr::simulate_oracle())
lf2 <- dbplyr::lazy_frame(x = 1:4, src = dbplyr::simulate_oracle())
lf1 %>% setdiff(lf2) %>% show_query()
#> <SQL> (SELECT *
#> FROM `df`)
#> EXCEPT
#> (SELECT *
#> FROM `df`)

[ghost]

This issue was moved by krlmlr to tidyverse/dbplyr/issues/111.

[lock]

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