Add benchmarks for json string serialize/deserialize (#12258)

Co-authored-by: sfan5 <sfan5@live.de>

lib/catch2/CMakeLists.txt

@@ -0,0 +1,16 @@
+# catch2 is distributed as a standalone header.
+#
+# Downloaded from:
+#
+#      https://github.com/catchorg/Catch2/releases/download/v2.13.9/catch.hpp
+#
+# The following changes were made to always print in microseconds, fixed format:
+#
+# -    explicit Duration(double inNanoseconds, Unit units = Unit::Auto)
+# +    explicit Duration(double inNanoseconds, Unit units = Unit::Microseconds)
+#
+# -        return os << duration.value() << ' ' << duration.unitsAsString();
+# +        return os << std::fixed << duration.value() << ' ' << duration.unitsAsString();
+
+add_library(catch2 INTERFACE)
+target_include_directories(catch2 INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})