[FIX] stock_account: check destination and source locations in forecast

Steps:
- Go to Inventory / Products / Products
- Create a product (2)
  - Storable Product
  - Cost: 10
- Click Update Quantity
- Create a new quantity line with 3 in On Hand Quantity
- Update the line with 1 in On Hand Quantity
- Go back to the product
- Click the "Forecasted" smart button

Bug:
The on hand value is 30 instead of 10.

Explanation:
When `location_dest_id` is the current location, it is used to specify
that a given quantity has been added to this location's stock. However,
when removing a quantity, the move goes from the current location to a
virtual one. The current location is, in this case, stored in
`location_id` and the destination is the virtual location.
This makes stock removals not appear in the on hand value since we only
filter the layers on their move's `location_dest_id`.

This commit assumes that a move always goes from or to a virtual
location and checks if the current location is in `location_dest_id` or
in `location_id`.

opw:2510911

closes odoo/odoo#69969

Signed-off-by: Arnold Moyaux <amoyaux@users.noreply.github.com>

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