[16.0][IMP] purchase_sale_inter_company : delivery date propagation

[Kev-Roche]

Inspired of https://github.com/OCA/multi-company/pull/669

Propagate the commitment date from sale to purchase in the buyer company

[flotho]

Hi @Kev-Roche , any chance to rebase ?

[metaminux]

Hi @Kev-Roche , any chance to rebase ? ;)

[github-actions[bot]]

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