MDEV-34528: bundle fmt version 11.0.0

Numerous fixes included from upstream.

/utf8 needed for Windows, but may as well
enable globally.

cmake/libfmt.cmake

@@ -15,8 +15,8 @@ MACRO(BUNDLE_LIBFMT)
   ExternalProject_Add(
     libfmt
     PREFIX   "${dir}"
-    URL      "https://github.com/fmtlib/fmt/archive/refs/tags/8.0.1.zip"
-    URL_MD5  e77873199e897ca9f780479ad68e25b1
+    URL      "https://github.com/fmtlib/fmt/archive/refs/tags/11.0.0.zip"
+    URL_MD5  f690d14b38d0fa473ea414ecf4e9c1a2
     INSTALL_COMMAND ""
     CONFIGURE_COMMAND ""
     BUILD_COMMAND ""

cmake/os/Windows.cmake

@@ -273,6 +273,7 @@ IF(MSVC)
     STRING(APPEND CMAKE_CXX_FLAGS_RELEASE " /d2OptimizeHugeFunctions")
     STRING(APPEND CMAKE_CXX_FLAGS_RELWITHDEBINFO " /d2OptimizeHugeFunctions")
   ENDIF()
+  ADD_COMPILE_OPTIONS($<$<COMPILE_LANGUAGE:C,CXX>:/utf-8>)
 ENDIF()
 
 # Always link with socket/synchronization libraries