[IMP] util/modules: add xmlid_mapping param to merge_module

[apan-odoo]

Add an optional xmlid_mapping param to rename specific XMLIDs during a module rename/merge, before the rest of the bulk move happens.

[robodoo]

[apan-odoo]

Example usage:

util.merge_module(
    cr,
    "l10n_ar_stock_batch",
    "l10n_ar_stock",
    xmlid_mapping={
        "action_generate_delivery_guide": "action_generate_delivery_guide_for_batch",
    },
)

[KangOl]

upgradeci retry with always only base

[KangOl]

Modifying rename_module is not needed.
It's only relevant for merge_module to handle the conflicts.

I would also verify that the mapping doesn't contain fully-qualified xmlids, like for the keep argument of move_model.

[apan-odoo]

Modifying rename_module is not needed. It's only relevant for merge_module to handle the conflicts.

Considered rename_module as discussed on Discord. Anyway, I removed it as suggested. Thanks!

[KangOl]

Can you please rebase?

[aj-fuentes]

Too verbose. Too many implementation details.

Suggested change

	present in `into` (the warning above), even though they
	refer to unrelated records; without this, that XMLID's
	record would simply be deleted rather than merged. Each
	pair is moved via :func:`rename_xmlid` before the general
	data-merge query runs, so it's excluded from the
	collision check and survives the merge under its new name.
	present in `into`.
	See :func:`~odoo.upgrade.util.records.rename_xmlid`

Cross file func references don't work unless fully qualified