[FIX] l10n_sa_edi: fix access to attachment of EDI document

Steps to reproduce:
- Install Accounting and l10n_sa_edi
- Connect with a non-admin user (e.g. Marc Demo)
- Switch to a SA company
- Create an invoice
- Click on "SEND & PRINT"
=> A traceback is raised when trying to access the attachment linked to
the ZATCA document.

Cause:
Since this commit https://github.com/odoo/odoo/commit/44a4cdb3944a4b722dcfbca5e2947a4372b8501d
the attachment of an EDI document is restricted to users with
"Administration: Settings" rights.

opw-3663305

closes odoo/odoo#149055

X-original-commit: 2fa9626f45b8c0c890d0771d731c4a13c5a7a9d1
Signed-off-by: Olivier Colson (oco) <oco@odoo.com>
Signed-off-by: Anh Thao Pham (pta) <pta@odoo.com>

addons/l10n_sa_edi/models/account_move.py

@@ -47,7 +47,7 @@ class AccountMove(models.Model):
                     qr_code_str = move._l10n_sa_get_qr_code(move.journal_id, xml_content, b64decode(x509_cert),
                                                             move.l10n_sa_invoice_signature, True)
                     qr_code_str = b64encode(qr_code_str).decode()
-                elif zatca_document.state == 'sent' and zatca_document.attachment_id.datas:
+                elif zatca_document.state == 'sent' and zatca_document.sudo().attachment_id.datas:
                     document_xml = zatca_document.attachment_id.with_context(bin_size=False).datas.decode()
                     root = etree.fromstring(b64decode(document_xml))
                     qr_node = root.xpath('//*[local-name()="ID"][text()="QR"]/following-sibling::*/*')[0]