fix: fixed schema alias template to really generate type aliases

[bit0rez]

Problem code example

// Some schema type
type SomeType struct {
  SomeField string
}

func (s *SomeType) GetSomeField() string {
  return s.SomeField
}

// Aliases

type Foo SomeType
type Bar SomeType

x := &Foo{}
y := &Bar{}

x.GetSomeField() // <- Compile Error: x.GetSomeField undefined (type *Foo has no field or method GetSomeField)
y.GetSomeField() // <- Compile Error: y.GetSomeField undefined (type *Bar has no field or method GetSomeField)

So, client can't use interface for this types and access SomeField in some cases.

Just generate real go type alias and embed structures to fixing this problem.

[abemedia]

What if the alias has different validation or defaults? Making it an actual go type alias would break this.

[bit0rez]

What if the alias has different validation or defaults? Making it an actual go type alias would break this.

I'll rollback this for non struct types. For structs with embedding it works fine.

[bit0rez]

UP!

[ernado]

This breaks tests:

ernado@nexus:/src/ogen/ogen$ make test
# github.com/ogen-go/ogen/internal/integration/test_http_requests
internal/integration/test_http_requests/oas_request_decoders_gen.go:165:60: cannot convert unwrapped (variable of struct type SimpleObject) to type AllRequestBodiesApplicationXWwwFormUrlencoded
internal/integration/test_http_requests/oas_request_decoders_gen.go:401:68: cannot convert unwrapped (variable of struct type SimpleObject) to type AllRequestBodiesOptionalApplicationXWwwFormUrlencoded

Please iterate with make generat examples to fix it, so I can merge this.

[ernado]

Please fix make test result