[18.0][MIG] website_sale_product_minimal_price: Migration to 18.0

[pablo-cort-s73]

Migration to 18.0

This commit migrates the website_sale_product_minimal_price module to Odoo version 18.0.

Main changes:

• Bumped the module version in __manifest__.py from 17.0.1.0.0 to 18.0.1.0.0.
• Refactored the _get_sales_prices method in product_template.py to match the new Odoo API, now receiving website instead of pricelist and fiscal_position.
• Updated test files to use the new odoo.fields.Command API for creating and linking records, replacing the old tuple-based syntax.
• Improved tour test selectors for better reliability and compatibility with Odoo 18.0.
• Updated QWeb templates to use new variable names and sorting logic for product attribute values, ensuring correct display and order by minimal price.

[OCA-git-bot]

This PR has the approved label and has been created more than 5 days ago. It should therefore be ready to merge by a maintainer (or a PSC member if the concerned addon has no declared maintainer). 🤖

[Reyes4711-S73]

@OCA/e-commerce-maintainers Please, can you merge this PR?