[FIX] account: liquidity-line currency journal ok
[FIX] account: liquidity-line currency journal ok

If we do a payment with:
- a currency different than the journal
- the journal currency the same as company currency

=> it fails, because of the constraint on account.move.line:

> The amount expressed in the secondary currency must be positive when
> account is debited and negative when account is credited.

with code:

```
CHECK(currency_id IS NULL OR company_currency_id IS NULL OR
((currency_id != company_currency_id) AND {conditions on balance}))
```

This happens because in this use case, a NON-NULL currency_id means that
the currency is different than the company currency, this was not taken
into account when creating a liquidity line.

opw-2150267
closes #41244

closes odoo/odoo#41278

X-original-commit: f9d75e3a5442162538c727eb7e4f111c9b792104
Signed-off-by: Nicolas Lempereur (nle) <2907e499a003d1c3ab7944c0a40c6df46e3e3c2f@odoo.com>

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