Add flow suppression in deprecatedDecodeMinimallyEncodedRawThreadInfo before call to decodeMinimallyEncodedMemberInfo.
This code path will only be encountered during legacy migrations where member permissions ARE persisted so flow "issues" aren't relevant going forward because deprecatedDecodeMinimallyEncodedRawThreadInfo should never be called anywhere new.
This gets us down to 2 flow issues, both with minimallyEncodeRawThreadInfo.
Depends on D12599