new page for Allure migration script

[TetianaKhomenko]

Allure migration script https://github.com/testomatio/migrate-allure
Reference page https://docs.testomat.io/project/import-export/import/import-tests-from-qmetry/

[YanaBaranova0909]

Docs https://docs.testomat.io/project/import-export/import/import-tests-from-allure-testops/