[16.0][FIX] account_credit_control: translate credit line table in emails

[astirpe]

Current behavior:
When generating credit control emails with the mail_show_invoice_detail option enabled, the injected HTML table containing the invoice details ("Invoices summary", "Due date", etc.) is rendered in the language of the user triggering the action (or the cron user). It ignores the partner's configured language.

Expected behavior:
The injected table's headers, date formats, and currency formats should seamlessly match the language of the recipient, aligning with how the rest of the mail.template is translated.

Proposed changes:

• Updated _get_credit_control_communication_table in credit.control.communication to force the environment context to match contact_address_id.lang (falling back to en_US) before evaluating the _("...") gettext aliases and format helpers.
• This mimics the exact logic used in the lang field of the credit control mail templates.
• Added test coverage in test_credit_control_communication_translation.py to ensure the context propagation successfully translates the standard table headers.