feat: add SetBeforeSendFeedback to process feedback before sending #4092#4224

diegonunfio wants to merge 3 commits intogetsentry:maingetsentry/sentry-dotnet:mainfrom

diegonunfio:feature/before-send-feedback-callbackdiegonunfio/sentry-dotnet:feature/before-send-feedback-callbackCopy head branch name to clipboard