l10n_it_intrastat: added company rule on intrastat line

[Borruso]

Manage intrastat line in database multi company

Version

• [ ] v14: https://github.com/OCA/l10n-italy/pull/4245
• [ ] v16

[SirAionTech]

@Borruso puoi indicare come si testa funzionalmente? grazie!

Originally posted by @francesco-ooops in https://github.com/OCA/l10n-italy/issues/4245#issuecomment-2199642851

[francesco-ooops]

@Borruso puoi indicare come si testa funzionalmente? grazie!

Originally posted by @francesco-ooops in #4245 (comment)

https://github.com/OCA/l10n-italy/pull/4245#issuecomment-2202176814