Allow `primary_key` argument to `empty_insert_statement_value`

to support Oracle database support identity data type

Oracle database does not support `INSERT .. DEFAULT VALUES`
then every insert statement needs at least one column name specified.

When `prefetch_primary_key?` returns `true` insert statement
always have the primary key name since the primary key value is selected
from the associated sequence. However, supporting identity data type
will make `prefetch_primary_key?` returns `false`
then no primary key column name added.
As a result, `empty_insert_statement_value` raises `NotImplementedError`

To address this error `empty_insert_statement_value` can take
one argument `primary_key` to generate insert statement like this.

`INSERT INTO "POSTS" ("ID") VALUES(DEFAULT)`

It needs arity change for the public method but no actual behavior changes for the bundled adapters.

Oracle enhanced adapter `empty_insert_statement_value` implementation will be like this:

```
def empty_insert_statement_value(primary_key)
  raise NotImplementedError unless primary_key
  "(#{quote_column_name(primary_key)}) VALUES(DEFAULT)"
end
```

[Raise NotImplementedError when using empty_insert_statement_value with Oracle](https://github.com/rails/rails/pull/28029)
[Add support for INSERT .. DEFAULT VALUES](https://community.oracle.com/ideas/13845)

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