Log when large files are ignored by GitGuardian Integration
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=442193) </details> <!--IssueSummary end--> ## Problem GitGuardian has a limit of 1 MB on the `document` content. See [GitGuardian API doc](https://api.gitguardian.com/docs#operation/content_scan). We already ignore files that are above 1 MB [here](https://gitlab.com/gitlab-org/gitlab/-/blob/e0355289f7440cb6a0664b00f0c49e879b5e2d38/ee/lib/gitlab/checks/integrations/git_guardian_check.rb#L20). We need to send out a log in the shell or UI, to the user when a file is ignored without blocking the process .
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