[CI] Start using the latest webmail (2.0.5) and adjust ports (#28310)

.github/workflows/e2e-main.yml

.github/workflows/e2e-tests.yml

.github/workflows/percy-issue-comment.yml

.github/workflows/percy-visual-label.yml

frontend/test/__support__/e2e/cypress_data.js

frontend/test/__support__/e2e/helpers/e2e-email-helpers.js

frontend/test/metabase/scenarios/README.md

...d/test/metabase/scenarios/admin/settings/email.cy.spec.js

.../test/metabase/scenarios/permissions/sandboxes.cy.spec.js

...009-nodata-creates-subscription-receives-error.cy.spec.js

...8344-subscription-shows-original-question-name.cy.spec.js

...roductions/18352-subscription-int64-value-card.cy.spec.js

...ductions/21559-subscription-bar-sent-as-scalar.cy.spec.js

.../test/metabase/scenarios/sharing/subscriptions.cy.spec.js