chore: Add chord patch for abseil

Author: Tradias

deps/abseil/chord.patch

@@ -0,0 +1,15 @@
+diff --git a/absl/strings/cord.h b/absl/strings/cord.h
+index 1d8fcd37..2e8fd500 100644
+--- a/absl/strings/cord.h
++++ b/absl/strings/cord.h
+@@ -849,8 +849,8 @@ class Cord {
+   friend bool operator==(const Cord& lhs, const Cord& rhs);
+   friend bool operator==(const Cord& lhs, absl::string_view rhs);
+ 
+-#ifdef __cpp_impl_three_way_comparison
+-
++#if defined(__cpp_impl_three_way_comparison) && \
++    defined(__cpp_lib_three_way_comparison)
+   // Cords support comparison with other Cords and string_views via operator<
+   // and others; here we provide a wrapper for the C++20 three-way comparison
+   // <=> operator.

deps/abseil/portfile.cmake

@@ -23,7 +23,8 @@ vcpkg_from_github(
     HEAD_REF
     master
     PATCHES
-    ${TIME_PATCH})
+    ${TIME_PATCH}
+    chord.patch)
 
 # With ABSL_PROPAGATE_CXX_STD=ON abseil automatically detect if it is being compiled with C++14 or C++17, and modifies
 # the installed `absl/base/options.h` header accordingly. This works even if CMAKE_CXX_STANDARD is not set. Abseil uses