[Exporter] Group spans by resource and instrumentation scope in OTLP export requests #8575

Job	Run time
CMake gcc 12 (maintainer mode, C++11, async)	11m 41s
CMake clang 14 (maintainer mode, async)	17m 39s
CMake clang 14 (maintainer mode, sync)	24m 23s
CMake gcc 12 (maintainer mode, async)	11m 5s
CMake gcc 12 (maintainer mode, sync)	13m 10s
CMake test (without otlp-exporter)	8m 33s
CMake msvc (maintainer mode)	10m 46s
CMake test (with abseil)	7m 14s
CMake gcc 4.8 (with otlp exporter)	15m 17s
CMake gcc 4.8 (without otlp exporter)	6m 17s
CMake test (with opentracing-shim)	7m 56s
CMake C++20 test(GCC)	13m 21s
CMake test (without otlp-exporter and with async export)	7m 37s
Bazel asan config	11m 52s
Bazel nortti	26m 9s
Bazel noexcept	19m 26s
Bazel	19m 25s
Bazel with async export	20m 32s
Bazel valgrind	24m 4s
Bazel with external abseil	24m 36s
CMake do not install test (with otlp-exporter)	21m 22s
CMake install test (with abseil)	6m 26s
CMake test (with modern protobuf,grpc and abseil)	30m 3s
CMake test (build shared libraries with otlp-exporter and static gRPC)	21m 23s
CMake test (with otlp-exporter)	28m 54s
CMake C++20 test(Clang with libc++)	12m 49s
Plugin -> CMake	1m 21s
Bazel on MacOS	28m 50s
Bazel tsan config	22m 16s
Benchmark	12m 37s
Code coverage	14m 36s
Copyright	16s
DocFX check	44s
Format	22s
markdown-lint	14s
misspell	5s
CMake -> exporter proto	17m 14s
Bazel Windows	35m 40s
Plugin -> CMake Windows	10m 21s
CMake (With async export) -> exporter proto	16m 48s
CMake -> exporter proto (Build as DLL)	17m 53s
	10h 1m 17s

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