New End-to-end test: Geo Replication of Personal Snippets

Description of the test

• Create personal snippet via API
• Visit Geo secondary node and check that snippet appears as expected
• Delete personal snippet via API

Other notes about this MR

• Adds module function to wait for geo replication, that can be used in multiple page objects (related to https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/697)
• Adds component snippet index that can be used for project- and personal-snippet index pages
• Updates Geo project snippet test to create and delete snippet resource via API

gitlab-org/quality/testcases#912

https://gitlab.com/gitlab-org/quality/team-tasks/-/issues/697

Check-list

• Confirm the test has a testcase: tag linking to an existing test case in the test case project.
• Note if the test is intended to run in specific scenarios. If a scenario is new, add a link to the MR that adds the new scenario.
• Follow the end-to-end tests style guide and best practices.
• Use the appropriate RSpec metadata tag(s).
• Ensure that a created resource is removed after test execution.
• Verify the tags to ensure it runs on the desired test environments.