Allow enabling TranslateError for session too instead of only globally

[OrkhanAlikhanov]

Describe the feature

Allow enabling TranslateError for gorm.Session instead of only globally (gorm.Config)

Motivation

I'd like to enable TranslateError option for a session instead of globally. I want to be able detect duplicate key error across dialects but without enabling it for the entire app as translated error loses the useful information like why the duplicate key information was raised.

It would be nicer if gorm errors had Unwrap() method implemented but they don't and probably won't.

Example usage:

tx := DB.Session(&gorm.Session{TranslateError: true})
err := tx.Create(...).Error

if errors.Is(err, gorm.ErrDuplicatedKey) {
  // do something
}

Workaround is to modify the copied Config manually:

tx := DB.Session(&gorm.Session{TranslateError: true})
tx.Config.TranslateError = true // <-- Added this line
err := tx.Create(...).Error

if errors.Is(err, gorm.ErrDuplicatedKey) {
  // do something
}

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