This update removes a temporary HR interface workaround because the underlying field alignment issue has now been fixed properly elsewhere. It helps keep the HR module cleaner and reduces the chance of duplicated or conflicting styling fixes.

This PR removes the hotfix for the alignment issue of the m2o field as it is fixed more properly by the PR https://github.com/odoo/odoo/pull/226214.

Task-5078736

Forward-Port-Of: odoo/odoo#226797

An unused behind-the-scenes formatting method was removed from accounting reports because it duplicated existing behavior. This simplifies maintenance without changing how users view or interact with reports.

Removing `format_value` method, as it does nothing more than
`_format_value` and is never called by the client.