[17.0][MIG] project_tag_hierarchy: migration to version 17.0

[atgalvez08]

@BinhexTeam

This PR migrates the addon project_tag_hierarchy to Odoo 17.0 using oca-port, preserving the original addon history.

Main changes introduced during the migration:

• Replace the deprecated name_get override with a computed display_name field using _compute_display_name, following Odoo 17 core guidelines.
• Remove the custom recursion constraint on parent_id, as Odoo 17 already enforces recursion detection at core level for models using _parent_store, raising a UserError before model constraints are evaluated.
• Add a test to explicitly cover recursion detection, aligned with the actual behavior of the Odoo 17 core.
• Update tests to comply with OCA testing guidelines for Odoo 17 (TransactionCase and proper test tagging).

Fixes #1191