[IMP] account_fiscal_year_closing: Avoid memory error

[Chionne27]

mapped loads a lot of data in the cache, so when we are closing a fiscal year with a lot of lines the following exception might be raised:

  File "/opt/odoo/custom/oca/account-closing/account_fiscal_year_closing/models/account_fiscalyear_closing.py", line 291, in button_calculate
    res = self.calculate()
  File "/opt/odoo/custom/oca/account-closing/account_fiscal_year_closing/models/account_fiscalyear_closing.py", line 275, in calculate
    move, data = config.moves_create()
  File "/opt/odoo/custom/oca/account-closing/account_fiscal_year_closing/models/account_fiscalyear_closing.py", line 509, in moves_create
    move_lines = self._mapping_move_lines_get()
  File "/opt/odoo/custom/oca/account-closing/account_fiscal_year_closing/models/account_fiscalyear_closing.py", line 456, in _mapping_move_lines_get
    balance, move_line = account_map.move_line_prepare(account, lines)
  File "/opt/odoo/custom/oca/account-closing/account_fiscal_year_closing/models/account_fiscalyear_closing.py", line 593, in move_line_prepare
    balance = sum(account_lines.mapped("debit")) - sum(
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 5292, in mapped
    recs = recs._fields[name].mapped(recs)
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1109, in mapped
    self.__get__(first(remaining), type(remaining))
  File "/usr/lib/python3/dist-packages/odoo/fields.py", line 1019, in __get__
    recs._fetch_field(self)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3078, in _fetch_field
    self._read(fnames)
  File "/usr/lib/python3/dist-packages/odoo/models.py", line 3175, in _read
    self.env.cache.update(fetched, field, values)
  File "/usr/lib/python3/dist-packages/odoo/api.py", line 817, in update
    field_cache.update(zip(records._ids, values))
Exception

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 652, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/usr/lib/python3/dist-packages/odoo/http.py", line 317, in _handle_exception
    raise exception.with_traceback(None) from new_cause
MemoryError

[francesco-ooops]

@grindtildeath fw-porting of #346

[github-actions]

There hasn't been any activity on this pull request in the past 4 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days.
If you want this PR to never become stale, please ask a PSC member to apply the "no stale" label.

[francesco-ooops]

@OCA/accounting-maintainers can this be reopened and merged? thanks!

[grindtildeath]

/ocabot merge patch

[OCA-git-bot]

This PR looks fantastic, let's merge it!
Prepared branch 16.0-ocabot-merge-pr-348-by-grindtildeath-bump-patch, awaiting test results.

[OCA-git-bot]

@grindtildeath your merge command was aborted due to failed check(s), which you can inspect on this commit of 16.0-ocabot-merge-pr-348-by-grindtildeath-bump-patch.

After fixing the problem, you can re-issue a merge command. Please refrain from merging manually as it will most probably make the target branch red.