Elasticsearch exporter build fails with nlohmann_json version 3.10.5 and older

[dbarker]

Describe your environment
main at b4328c0
Ubuntu 22.04 github runner (setup with ./ci/setup_goolgletest.sh)

Steps to reproduce
Set up a Ubuntu 22.04 runner
Build with WITH_ELASTICSEARCH=ON

What is the expected behavior?
Build succeeds

What is the actual behavior?
Build fails

/home/runner/work/opentelemetry-cpp/opentelemetry-cpp/exporters/elasticsearch/src/es_log_recordable.cc:35:9: error: no match for ‘operator=’ (operand types are ‘nlohmann::basic_json<>’ and ‘const opentelemetry::v1::nostd::span<const unsigned char>’)
   35 |     *j_ = u;
      |     ~~~~^~~
In file included from /home/runner/work/opentelemetry-cpp/opentelemetry-cpp/exporters/elasticsearch/src/es_log_recordable.cc:8:
/usr/include/nlohmann/json.hpp:1926:17: note: candidate: ‘nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>& nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>::operator=(nlohmann::basic_json<ObjectType, ArrayType, StringType, BooleanType, NumberIntegerType, NumberUnsignedType, NumberFloatType, AllocatorType, JSONSerializer>) [with ObjectType = std::map; ArrayType = std::vector; StringType = std::__cxx11::basic_string<char>; BooleanType = bool; NumberIntegerType = long int; NumberUnsignedType = long unsigned int; NumberFloatType = double; AllocatorType = std::allocator; JSONSerializer = nlohmann::adl_serializer]’
 1926 |     basic_json& operator=(basic_json other) noexcept (
      |                 ^~~~~~~~
/usr/include/nlohmann/json.hpp:1926:38: note:   no known conversion for argument 1 from ‘const opentelemetry::v1::nostd::span<const unsigned char>’ to ‘nlohmann::basic_json<>’
 1926 |     basic_json& operator=(basic_json other) noexcept (
      |                           ~~~~~~~~~~~^~~~~
make[2]: *** [exporters/elasticsearch/CMakeFiles/opentelemetry_exporter_elasticsearch_logs.dir/build.make:93: exporters/elasticsearch/CMakeFiles/opentelemetry_exporter_elasticsearch_logs.dir/src/es_log_recordable.cc.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:9780: exporters/elasticsearch/CMakeFiles/opentelemetry_exporter_elasticsearch_logs.dir/all] Error 2

Additional context
The ubuntu runners install nlohmann-json3-dev with ci/setup_googletest.sh The Elasticsearch exporter can build against the package on Ubuntu 24.04 (version 3.11.3) but fails on Ubuntu 22.04 (version 3.10.5) and older.