[FIX] spreadsheet: correctly get pivot id from position

[pro-odoo]

Steps to reproduce in 17.0:

There's no way to reproduce the issue in 17.0 because the faulty getter in only called on positions in the active sheet (pivot autofill, global filter auto-matching)

Steps to reproduce in saas-17.1:

• insert a pivot in a blank spreadsheet
• delete all pivot formulas
• insert a new sheet
• in the new sheet:
  • in A1: type "1"
  • in A2: =ODOO.PIVOT(A1)
• activate the first sheet again
• Open the Data menu => the pivot 1 is marked as being unused, even though it's used in the second sheet

Task: 3859472 X-original-commit: https://github.com/odoo/odoo/commit/0f9161ebc3589678fea5a0b242b00c01b8df2725

Description:

description of this task, what is implemented and why it is implemented that way.

Task: : TASK_ID

review checklist

• [ ] feature is organized in plugin, or UI components
• [ ] support of duplicate sheet (deep copy)
• [ ] in model/core: ranges are Range object, and can be adapted (adaptRanges)
• [ ] in model/UI: ranges are strings (to show the user)
• [ ] undo-able commands (uses this.history.update)
• [ ] multiuser-able commands (has inverse commands and transformations where needed)
• [ ] new/updated/removed commands are documented
• [ ] exportable in excel
• [ ] translations (_t("qmsdf %s", abc))
• [ ] unit tested
• [ ] clean commented code
• [ ] track breaking changes
• [ ] doc is rebuild (npm run doc)
• [ ] status is correct in Odoo

[robodoo]