GIthub action to generate allure report and post comment with report link on PR

Inputs

• token: Github token
• allure_server: Allure server URL
• body: Comment body
• pr_number: Number of PR to comment
• project_id: Allure-server project id to associate report with (e.g. gusa-desktop-integrations)
• results_directory: Directory with allure-results xml files (e.g. specs/allure-results)