E2E: Dismiss Duo Chat callout for overage_modal_spec

What does this MR do and why?

Fixes the following failing tests:

• https://gitlab.com/gitlab-org/gitlab/-/issues/456519
• https://gitlab.com/gitlab-org/gitlab/-/issues/456518
• https://gitlab.com/gitlab-org/gitlab/-/issues/456520
• https://gitlab.com/gitlab-org/gitlab/-/issues/456517

This MR:

• Prepends the new DuoChatCallout component introduced in !149522 (merged) to qa/qa/page/dashboard/groups.rb, qa/qa/page/group/members.rb and qa/qa/page/project/members.rb
• Checks for the Duo Chat callout before clicking the new group button or invite members button, and dismisses it if present

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.