[Validator] Added Swedish translations
minor #11561 [Validator] Added Swedish translations (Nyholm)

This PR was merged into the 2.4 branch.

Discussion
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[Validator] Added Swedish translations

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | part of #11489
| License       | MIT

Added some missing Swedish translations.

Should I make an additional PR to `master` for the `trans-unit id=78` ([ref](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Validator/Resources/translations/validators.en.xlf#L302))? Or should I add that in this PR?

Commits
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a361f10 [Validator] Added Swedish translations