[Exporter] Group spans by resource and instrumentation scope in OTLP export requests #8565

Job	Run time
CMake test (with abseil)	7m 2s
CMake clang 14 (maintainer mode, async)	17m 3s
CMake clang 14 (maintainer mode, sync)	17m 4s
CMake gcc 12 (maintainer mode, async)	11m 23s
CMake gcc 12 (maintainer mode, C++11, async)	10m 51s
CMake gcc 12 (maintainer mode, sync)	12m 57s
CMake msvc (maintainer mode)	11m 59s
CMake test (without otlp-exporter)	8m 38s
CMake test (without otlp-exporter and with async export)	7m 14s
CMake do not install test (with otlp-exporter)	21m 29s
CMake gcc 4.8 (without otlp exporter)	5m 38s
CMake gcc 4.8 (with otlp exporter)	15m 31s
CMake test (with modern protobuf,grpc and abseil)	28m 49s
CMake test (with opentracing-shim)	6m 6s
CMake test (with otlp-exporter)	21m 6s
CMake C++20 test(Clang with libc++)	13m 43s
Bazel asan config	12m 47s
Bazel noexcept	19m 32s
CMake C++20 test(GCC)	11m 38s
Bazel nortti	23m 31s
Bazel	20m 51s
Bazel with async export	19m 30s
Bazel with external abseil	28m 26s
Bazel valgrind	24m 35s
CMake install test (with abseil)	8m 35s
CMake test (build shared libraries with otlp-exporter and static gRPC)	19m 44s
Plugin -> CMake	1m 10s
Bazel on MacOS	29m 15s
Bazel tsan config	21m 8s
Benchmark	18m 21s
Code coverage	14m 31s
Copyright	9s
DocFX check	1m 25s
Format	14s
markdown-lint	10s
misspell	7s
CMake -> exporter proto	17m 28s
Bazel Windows	35m 59s
Plugin -> CMake Windows	9m 5s
CMake (With async export) -> exporter proto	17m 0s
CMake -> exporter proto (Build as DLL)	23m 7s
	9h 54m 51s

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