Migrate all tests from the functional test to the security-dashboard-plugin

[peternied]

Description

The security dashboard plugin has tests in its repository for unit, component, and integration testing and there are additional test cases outside the plugin that are located in the opensearch-dashboards-functional-test we should consolidate all tests into the security repo to be sure that the product functionality is working as intended as changed are maded.

Acceptance Criteria

• Copy all tests from https://github.com/opensearch-project/opensearch-dashboards-functional-test/tree/main/cypress/integration/plugins/security into the security dashboard plugin
• Delete all tests from https://github.com/opensearch-project/opensearch-dashboards-functional-test/tree/main/cypress/integration/plugins/security

[peternied]

FYI @davidlago Here is an issue to consolidate the testing infra

[peternied]

Looked into doing this. The amount of work required doesn't really pay off, since we already run the tests within our CI flow it can create some diamond dependency issues but those are very rare and not worth the headache of duplicating the function test repo.

I don't have guidance for where tests should be authored, IMO it makes sense to keep new tests in our repo unless they use functionality that is part the shared functional test repo codebase.