Refactor : Déplace "preserve cookie" dans support/index.js

..._sf/tests/E2E/cypress/integration/EmptyDB/1-login.spec.js

...sf/tests/E2E/cypress/integration/EmptyDB/2-params.spec.js

...E2E/cypress/integration/EmptyDB/3-search-empty-db.spec.js

..._sf/tests/E2E/cypress/integration/FullDB/4-search.spec.js

...sts/E2E/cypress/integration/FullDB/5-create-users.spec.js

...E/cypress/integration/FullDB/6-create-instructors.spec.js

...i_sf/tests/E2E/cypress/integration/FullDB/7-stats.spec.js

...ests/E2E/cypress/integration/FullDB/8-death-alert.spec.js

appli_sf/tests/E2E/cypress/support/index.js