fix(install): only install "tee" on Windows #36629

Problem:
AUR does not want a web-scale implementation of "tee".

Solution:
- Only install "tee" on Windows.
- The build will still produce `./build/bin/tee` on all platforms, to
  have more coverage and avoid special-cases in tests.

src/tee/CMakeLists.txt

@@ -5,6 +5,8 @@ set_target_properties(tee PROPERTIES
   RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
 )
 
-install(TARGETS tee
-  RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
-)
+if(WIN32)
+  install(TARGETS tee
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+  )
+endif()