Currently, payslip computation for Pakistan localization calculates incorrect tax when the yearly cost exceeds 2,200,000.

### **Steps to Reproduce:**
1) Install `l10n_pk_hr_payroll_account`,`hr_contract_salary` with demo data. 
2) Switch to PK company.
3) Create an employee and a running contract with yearly cost 2,200,001 
4) Create a payslip and compute it from the Salary Computation tab.

### **Observed Behavior:**
'Tax Bracket Yearly' is computed as `122000.24`

### **Expected Behavior:**
'Tax Bracket Yearly' should be `116000.24`

### **Root Cause:**
since [commit](https://github.com/odoo/enterprise/pull/98345/commits/62f5e216518d83317618d7dbc0be4db92d1881a3), the tax computation relies on  [_l10n_pk_get_tax](https://github.com/odoo/enterprise/blob/a9656336583a4d5c5b12d4d6120ec62ba1cf9151/l10n_pk_hr_payroll/models/hr_payslip.py#L9-L20) , In this method, the `result` is incorrectly accumulated with `fix` when iterating through brackets, leading to an inflated tax value.

[official pakistan document](https://download1.fbr.gov.pk/Docs/20258181281745641WHT-RateCard.pdf)

### **Fix:**
Use `result = fix` instead of `result += fix` so that the cumulative tax is correctly reset at each bracket.

**opw-5979265**

Forward-Port-Of: odoo/enterprise#110939

This reverts [1]

With enabled valuation and in case of a DB with many locations, it is currently
impossible to validate a picking or open the on hand quantity smart button:
it will lead to a traceback, for instance:
```
Traceback (most recent call last):
[...]
  File "/home/odoo/src/odoo/addons/stock/models/stock_picking.py", line 1432, in button_validate
    pickings_to_backorder.with_context(cancel_backorder=False)._action_done()
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[...]
  File "/home/odoo/src/odoo/addons/stock_account/models/product.py", line 205, in _prepare_valuation_layer_field_values
    "total_value": avg_cost * self.sudo(False)._with_valuation_context().qty_available if avg_cost else 0
                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[...]
  File "/home/odoo/src/odoo/addons/stock/models/product.py", line 172, in _compute_quantities_dict
    moves_in_res = {product.id: product_qty for product, product_qty in Move._read_group(domain_move_in_todo, ['product_id'], ['product_qty:sum'])}
                                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[...]
  File "/home/odoo/src/odoo/odoo/sql_db.py", line 371, in execute
    res = self._obj.execute(query, params)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
psycopg2.errors.SyntaxError: memory exhausted at or near "("
LINE 1: ...((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((...
```

[1] https://github.com/odoo/odoo/commit/c71c21647d468bd1f2e3261b6b612a060c4b6461

OPW-6083436

Forward-Port-Of: odoo/odoo#256799

**Steps to reproduce:**
* Install  `point_of_sale` module.
* Go to Settings:
     * Enable Lots & Serial Numbers.
     * Enable Variants.
     * Set Barcode Nomenclature to Default GS1 Nomenclature.
* Create a product:
     * Enable Track Inventory set to By Lots.
     * Under Attributes & Variants:
     * Add an attribute with two values and save.
* Generate product variants:
     * Open one variant and set barcode to 5123648695416.
* Update inventory:
     * Go to the main product (template).
     * Update On Hand Quantity:
             * Update On Hand Quantity with a lot/serial number:
               010512364869541610784512.
             * Select the variant with the defined barcode.
* Under Point of Sale tab:
    * Set a POS Category.
* Open a POS session and scan:
010512364869541610784512.

**Observed behavior:**
* Scanning the GS1 barcode in POS raises a traceback:
  *TypeError: Cannot read properties of undefined (reading
  'product_template_attribute_value_ids')*.

**Cause:**

[Scans GS1 barcode: 010512364869541610784512]
│
├─ ProductScreen._barcodeGS1Action(parsed_results)
│    • product = await _getProductByBarcode(productBarcode)  ✅ found
│    • calls `addLineToCurrentOrder(vals, { code: lotBarcode })`
│                                                              ⚠️ only `lotBarcode` passed, `productBarcode` discarded
│
├─ PosStore.addLineToCurrentOrder() → addLineToOrder()
│    • product has variants → isConfigurable() = true
│
├─ PosStore.handleConfigurableProduct()
│    • calls openConfigurator(productTemplate, { ...opts })
│      opts = { code: lotBarcode }
│
└─ PosStore.openConfigurator()
     • opts.code = lotBarcode  → truthy → enters if(opts.code) branch
     • getBy("barcode", opts.code.base_code)
     •  getBy("barcode", "784512")   ← "784512" is a LOT number, not a product barcode!
       → returns undefined ❌
     • product packaging lookup also fails → undefined ❌
     • product = undefined
     │
     └─ attributeLinesValues.map(values =>
            values.filter(value =>
                product.product_template_attribute_value_ids.includes(value)
                ^^^^^^^ undefined  → 💥 TypeError

**Fix:**
* Pass the product from `handleConfigurableProduct` to the configurator.
* If no product is found using `opts.code`, use the passed product
  instead.

---

opw-6031909