Fix QuicVersion MSVC compilation for Envoy Envoy reported a compilation issue with MSVC: https://github.com/envoyproxy/envoy/issues/10239 It appears that what we were doing before was technically undefined C++ behavior, so this CL switches use to using initialization lists which are allowed since C++11. This fix was developed thanks to Godbolt: https://godbolt.org/z/2jcJC4 gfe-relnote: n/a, no behavior change, not flag protected PiperOrigin-RevId: 301199417 Change-Id: I00aedb74d5699001cab023adaba9cc1114c53f17