feat(c/driver/postgresql): Implement ingestion of list types for PostgreSQL

[paleolimbot]

This PR adds list ingest support in the PostgreSQL driver. The raw COPY and type support had already been added; however, there were still some hard-coded switch-on-type that implemented some necessary features (e.g., the CREATE TABLE syntax for each type). I moved these to the type/copy section and removed the previous implementation (which should also help for a future PR implementing the ability to bind nested types as parameters).

I also added the infrastructure to test this in all drivers via the validation suite, which required modifying some of the built-in concepts to accommodate a nested type.

Closes #2066.

library(adbcdrivermanager)

con <- adbc_database_init(
  adbcpostgresql::adbcpostgresql(),
  uri = "postgresql://localhost:5432/postgres?user=postgres&password=password"
) |> 
  adbc_connection_init()

df <- tibble::tibble(
  A = vctrs::list_of(1:3, 4:5, 6:10),
  B = c(10.0, 20.0, 30.0)
)

con |> 
  execute_adbc("DROP TABLE IF EXISTS table_with_list")

df |> 
  write_adbc(con, "table_with_list")

con |> 
  read_adbc("select * from table_with_list") |> 
  tibble::as_tibble() |> 
  dplyr::pull(1)
#> <list_of<integer>[3]>
#> [[1]]
#> [1] 1 2 3
#> 
#> [[2]]
#> [1] 4 5
#> 
#> [[3]]
#> [1]  6  7  8  9 10

^{Created on 2024-09-11 with reprex v2.1.1}

[lidavidm]

Should this be named TypeName or something? Not table name?