Move telemetry cleansing into shared process

Follow up from https://github.com/microsoft/vscode/issues/138153 We do a bunch of cleansing operations so that we lower the chances to accidentally leak PII or any other sensible data to telemetry. This currently happens in the renderer process and therefore can impact performance, esp. startup performance. I also don't know how/if we clean telemetry from other processes, like the main process. Since telemetry is send from the shared process we should do the cleansing there so that even mistakes don't impact startup performance