[REF] stock_account: fifo "normal" cost method with valuation layers

We don't implement fifo negative handling in this commit.
We make sure we run fifo in average mode to get a proper remaining_qty
field.
`_run_fifo` is now a method on product (since it could be user outside
of a stock move context). It is really similar to its ancestor on the
stock move, with a few float_is_zero and compare more and a missing
remaing_value.

We move the valuation sanity check into a proper helper,
_sanity_check_for_valuation.

We complete the _create_correction_svl method with accounting entries.

task-1875873

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