As a user, I would like to use a meta tag on an HTML page on my site to validate that I own the site, so that I don't have upload a separate file or modify my server to include a header. ## Requirements A new validation option added to the validation modal to allow for use of an HTML meta tag with the validation string as the value. ## Designs  ## Implementation Issues | Issue | Description | Type | | ------ | ------ | ------ | | https://gitlab.com/gitlab-org/gitlab/-/issues/337003 | Add Meta Tag option & UI changes| gitlab~3412464 | | https://gitlab.com/gitlab-org/gitlab/-/issues/337009 | Add support for Meta Tag validation | gitlab~2492649 | | https://gitlab.com/gitlab-org/gitlab/-/issues/337711 | Add a new feature flag | gitlab~7884237 | | TBC | Update documentation | gitlab~2278655 | ## GraphQL decisions Add a new strategy to `DastSiteValidationStrategyEnum` - `META_TAG` ## Feature Flag - `dast_meta_tag_validation`