Fix: Add missing header used by recent backport fix

This was added in main by 2cfcb8b0b8, and used by
6a05e5161b which was cherry-picked from main
to the release branch.

source/blender/blenlib/BLI_binary_search.hh

@@ -0,0 +1,38 @@
+/* SPDX-FileCopyrightText: 2023 Blender Foundation
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/** \file
+ * \ingroup bli
+ */
+
+#include <algorithm>
+
+#include "BLI_utildefines.h"
+
+namespace blender::binary_search {
+
+/**
+ * Find the index of the first element where the predicate is true. The predicate must also be
+ * true for all following elements. If the predicate is false for all elements, the size of the
+ * range is returned.
+ */
+template<typename Iterator, typename Predicate>
+int64_t find_predicate_begin(Iterator begin, Iterator end, Predicate &&predicate)
+{
+  return std::lower_bound(begin,
+                          end,
+                          nullptr,
+                          [&](const auto &value, void * /*dummy*/) { return !predicate(value); }) -
+         begin;
+}
+
+template<typename Range, typename Predicate>
+int64_t find_predicate_begin(const Range &range, Predicate &&predicate)
+{
+  return find_predicate_begin(range.begin(), range.end(), predicate);
+}
+
+}  // namespace blender::binary_search

source/blender/blenlib/CMakeLists.txt

@@ -182,6 +182,7 @@ set(SRC
   BLI_assert.h
   BLI_astar.h
   BLI_atomic_disjoint_set.hh
+  BLI_binary_search.hh
   BLI_bit_group_vector.hh
   BLI_bit_ref.hh
   BLI_bit_span.hh