Internals: Fix many clang-tidy issues. No functional change intended.

src/V3Os.cpp

@@ -208,6 +208,7 @@ uint64_t V3Os::timeUsecs() {
 #if defined(_WIN32) || defined(__MINGW32__)
     return 0;
 #else
+    // NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
     timeval tv;
     if (gettimeofday(&tv, NULL) < 0) return 0;
     return static_cast<uint64_t>(tv.tv_sec)*1000000 + tv.tv_usec;