This commit fixes issues with downpayment and credit notes in project
profitability report.

Steps to reproduce opw-2596224:
- Go to sale
- Make a RFQ for a service product with service_policy set at
delivered_timesheet (Timesheets on tasks), set quantity as 10
- Confirm order and create two invoices for 15%, confirm the two
invoices
- Create a credit note for one of the invoice and confirm it
- Go back to the Sale Order and click on Project Overview
=> Inconsistencies (Downpayment reported twice)
- Add an expense
=> Inconsistencies in expense amount untaxed invoiced

This issue is fixed by :
- Excluding downpayments which are linked to a reversed invoice line
- Use expense amount to invoice and expense amount invoiced separetely
in the project overview.
- Do not report not invoiced SOLs in the expense amount invoiced.
- Exclude negative amounts in analytic account which are linked to
credit notes.

opw-2596224

closes odoo/odoo#78310

Signed-off-by: LTU-Odoo <IT-Ideas@users.noreply.github.com>