Remove deprecated static from Eigen that contributes to size increase (…

…#23084)

### Description
<!-- Describe your changes. -->
This patches Eigen source to remove an unused deprecated static var.

### Motivation and Context
Internal customer request.

cmake/external/eigen.cmake

@@ -15,6 +15,7 @@ else ()
             eigen
             URL ${DEP_URL_eigen}
             URL_HASH SHA1=${DEP_SHA1_eigen}
+            PATCH_COMMAND ${Patch_EXECUTABLE} --binary --ignore-whitespace -p1 < ${PROJECT_SOURCE_DIR}/patches/eigen/eigen-edge.patch
         )
     endif()
 

cmake/patches/eigen/eigen-edge.patch

@@ -0,0 +1,13 @@
+diff --git a/Eigen/src/Core/util/IndexedViewHelper.h b/Eigen/src/Core/util/IndexedViewHelper.h
+index f85de305f..3dc2bb5e7 100644
+--- a/Eigen/src/Core/util/IndexedViewHelper.h
++++ b/Eigen/src/Core/util/IndexedViewHelper.h
+@@ -178,7 +178,7 @@ namespace placeholders {
+
+   EIGEN_DEPRECATED static const all_t  all  = Eigen::all;    // PLEASE use Eigen::all    instead of Eigen::placeholders::all
+   EIGEN_DEPRECATED static const last_t last = Eigen::last;   // PLEASE use Eigen::last   instead of Eigen::placeholders::last
+-  EIGEN_DEPRECATED static const end_t  end  = Eigen::lastp1; // PLEASE use Eigen::lastp1 instead of Eigen::placeholders::end
++ // EIGEN_DEPRECATED static const end_t  end  = Eigen::lastp1; // PLEASE use Eigen::lastp1 instead of Eigen::placeholders::end
+ }
+
+ } // end namespace Eigen