[FIX] account: Ref rounding of tax_details for better handling of price-included #232186
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== Fix bug price-included ==
Suppose a line of 24.99 with a 20% tax price-included.
base: 24.99 / 1.2 = 20.825
tax: 20.825 * 0.2 = 4.165
If we round both, we get 20.83 + 4.17 = 25.0 != 24.99
== Split and simplify round_base_line_tax_details ==
Easier implementation of this method to be easier to understand and
easier to be customized (see PT override). Also, we now use the
aggregate methods to aggregate the amounts instead of doing that by hand.
opw-4505888
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Forward-Port-Of: #232025
Forward-Port-Of: #228437