Sub Issue 7: OSS + Silent config options into UpdateOptions

[JusterZhu]

Changes

1. Add OSS-related options to UpdateOptions (OSSProvider, OSSBucketRegion)
2. Add Silent-related options (SilentPollInterval, SilentAutoInstall) — these already exist
3. Mark standalone GeneralUpdateOSS, GeneralClientOSS, SilentUpdateMode as [Obsolete]

Part of Sub Issue 7 of GeneralUpdate v2 refactor plan.