New create index check breaks migration generation for Atlas

[mathieu-lemay]

GORM Playground Link

go-gorm/playground#774

Description

Since PR #285, the migration generation for Atlas fails. This is likely due to the generation using a mock database that doesn't really have the index.
Since that change, I get some failed to create index ... errors

How to reproduce

This sample program shows the issue. With go-gorm/[email protected], it works fine, but it fails with go-gorm/[email protected].

package main

import (
        "io"
        "log"
        "os"

        "ariga.io/atlas-provider-gorm/gormschema"

        "gorm.io/gorm"
)

type Product struct {
  gorm.Model

  Code  string
  Price uint
}

func main() {
        stmts, err := gormschema.New("postgres").Load(&Product{})

        if err != nil {
                log.Fatalf("error loading gorm schema: %v\n", err)
        }

        _, err = io.WriteString(os.Stdout, stmts)

        if err != nil {
                log.Fatalf("error writing statements to stdout: %v\n", err)
        }
}

Expected behavior: It should output a SQL script to create the Products table
Actual behavior: It fails with error loading gorm schema: failed to create index with name idx_products_deleted_at