gh-95656: Enable the sqlite3 load extension API in Windows build (GH-95662)

(cherry picked from commit 6a5104f4)

Co-authored-by: Erlend Egeberg Aasland <erlend.aasland@protonmail.com>

Misc/NEWS.d/next/Windows/2022-08-04-18-47-54.gh-issue-95656.VJ1d13.rst

+Enable the :meth:`~sqlite3.Connection.enable_load_extension` :mod:`sqlite3`
+API.

PCbuild/_sqlite3.vcxproj

@@ -94,7 +94,7 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <AdditionalIncludeDirectories>$(sqlite3Dir);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>PY_SQLITE_HAVE_SERIALIZE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>PY_SQLITE_HAVE_SERIALIZE;PY_SQLITE_ENABLE_LOAD_EXTENSION;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemGroup>