Change home URL to just the base path

[asteriscos]

Description

Hi team,
this pull request changes the login and logout URL references in the SAML configuration, so it's just the base path of Wazuh Dashboards. This is because the application should redirect the user to the home path, which can change over time and can also be changed in the platform configuration.

Closes #6773

Checks

Docs building

• Compiles without warnings.

Code formatting and web optimization

• Uses three spaces indentation.
• Adds or updates meta descriptions accordingly.
• Updates the redirects.js script if necessary (check this guide).

Writing style

• Uses present tense, active voice, and semi-formal registry.
• Uses short, simple sentences.
• Uses bold for user interface elements, italics for key terms or emphasis, and code font for Bash commands, file names, REST paths, and code.