Steps to reproduce:

1- create a company in saudi arabia
2- install l10n_sa and l10n_gcc_invoice
3- enable LN/SN on invoice from settings
4- configure a product with lot number
5- make a SO with that product
6- create an invoice and post it
7- print the invoice
8- Lot number information is missing on the invoice

Bug:

the implementation in
https://github.com/odoo/odoo/blob/15.0/addons/l10n_gcc_invoice/views/report_invoice.xml#L11-L16
is ignoring the inheritance in
https://github.com/odoo/odoo/blob/15.0/addons/stock_account/views/report_invoice.xml

so any view inheriting "account.report_invoice_document" will
not be called.

For stable, it can be solved with a bridge module.
For Master or for future versions, I think the implementation in
https://github.com/odoo/odoo/blob/15.0/addons/l10n_gcc_invoice/views/report_invoice.xml#L18

should be inheriting "account_report_invoice_document" instead
of overriding it. this will help eliminate the need for such
bridge modules in the future and reduce redundancy

Fix:
Create a bridge module between `l10n_gcc_invoice` and `stock_account`
OPW-2893130

Forward-Port-Of: odoo/odoo#95579

Description of the issue/feature this PR addresses:
When tax is configured to be "Include in Price", the e-faktur document violates official regulation. Prices columns in e-faktur has to be declared without tax inclusion. Current code does not differentiate behaviour when "Include in Price" configuration in tax is True or False.

Current behavior before PR:
When tax is configured to be "Include in Price", the prices columns (unit price and the total) includes tax, which violated the e-faktur documentation rule. Consequently, the calculation for discount will be flawed since the current discount amount computation is (price_unit * quantity) - price_subtotal.

Desired behavior after PR is merged:
Price columns (unit price and total) should no longer include tax, and will result to correct discount amount calculation.

Task:
2889400

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Forward-Port-Of: odoo/odoo#96525
Forward-Port-Of: odoo/odoo#94114