`autogenerate: [opts]` crashes on parameterized and composite field types

[lukaszsamson]

Elixir version

any

Database and Version

any

Ecto Versions

3.14.1

Database Adapter and Versions (postgrex, myxql, etc)

any

Current behavior

Using the list form of the :autogenerate field option with a parameterized or composite type compiles successfully but crashes on the first Repo.insert/2.
This appears to be a regression introduced by e6da70d

Repro:

defmodule MyParameterizedType do
  use Ecto.ParameterizedType

  def init(opts), do: opts
  def type(_params), do: :string

  def cast(value, _params), do: {:ok, value}
  def load(value, _loader, _params), do: {:ok, value}
  def dump(value, _dumper, _params), do: {:ok, value}

  def autogenerate(opts), do: Keyword.fetch!(opts, :value)
end

defmodule Example do
  use Ecto.Schema

  schema "examples" do
    field :value, MyParameterizedType,
      autogenerate: [value: "generated"]
  end
end

Repo.insert!(%Example{})

Result:

** (ArgumentError) you attempted to apply a function on
{:parameterized, {MyParameterizedType, ...}}.
Modules (the first argument of apply) must always be an atom

The same problem affects composite types

field :values, {:array, MyType},
  autogenerate: [value: ["generated"]]

Expected behavior

No crash