Handle Large Diffs

### Welcome - [x] Yes, I understand that the GitHub action repository is not the repository of golangci-lint itself. - [x] Yes, I've searched similar issues on GitHub and didn't find any. ### Your feature request related to a problem? Please describe. Large diffs can't be fetched from the GitHub API it seems ``` failed to fetch pull request patch: RequestError [HttpError]: Sorry, the diff exceeded the maximum number of lines (20000): {"resource":"PullRequest","field":"diff","code":"too_large"} - https://docs.github.com/rest/pulls/pulls#get-a-pull-request only new issues on pull_request: at /home/runner/work/_actions/golangci/golangci-lint-action/v9/dist/run/index.js:47763:21 at process.processTicksAndRejections (node:internal/process/task_queues:104:5) at async requestWithGraphqlErrorHandling (/home/runner/work/_actions/golangci/golangci-lint-action/v9/dist/run/index.js:47489:20) at async Job.doExecute (/home/runner/work/_actions/golangci/golangci-lint-action/v9/dist/run/index.js:56610:18) { ``` ### Describe the solution you'd like. There being a clear fallback to obtain the diff - eg. clone the fork/repo and checkout the SHA ### Describe alternatives you've considered. Didn't see any ### Additional context. _No response_