Purpose
======
This PR is in continuity of #15025 and #15264 done in 14.0.
The goal of this PR essentially updates and improves the changes done in 14.0.

## Details

- Remove 'create sale order' button in helpdesk.ticket.
- Changes the project field in related and stored field and remove task field in helpdesk.ticket model. Because
    - we don't need to link a ticket to a task to sale timesheets in ticket.
    - the project is always the project defined in the helpdesk.team linked to helpdesk.ticket. That's why this field is now a related and stored field.
- Store sale_line_id field in ticket.
- Merge helpdesk_sale_timesheet_edit module in helpdesk_sale_timesheet module.
- Update the search to get the last SOL of customer set in the helpdesk.ticket.
- compute sudo and store total_hours_spent field in helpdesk.ticket to get the total of all timesheets contained in the ticket.
- Remove bill_type field, because this field has been merged with the pricing_type field in sale_timesheet module.
- Add constraint to check if a timesheet is not linked to a task and a ticket at the same time.
- Restrict the pricing type of helpdesk projects to task rate only.
- Create helpdesk_fsm_sale module to make the bridge between the helpdesk_sale_timesheet and industry_fsm_sale.
- Remove the SO set in the project if this project has been changed to fsm project.
- Move and update the constraint for timesheet_product_id from sale_timesheet to industry_fsm_sale because this field is only required for fsm projects.
- Hide planned_hours, forecast_hours and effective_hours fields in planning.slot form view.
- Remove deprecated code.

Related PRs: 

- Community: odoo/odoo#64474
- Upgrade: odoo/upgrade#2080

Task-2424382