[SDK] Better control of threads executed by opentelemetry-cpp #10851

Job	Run time
CMake test (without otlp-exporter)	5m 40s
CMake clang 18 (maintainer mode, sync)	9m 52s
CMake gcc 14 (maintainer mode, async)	7m 54s
CMake gcc 14 (maintainer mode, sync)	7m 48s
CMake clang 18 (maintainer mode, abiv2)	9m 39s
CMake clang 18 (maintainer mode, async)	9m 40s
CMake msvc (maintainer mode)	8m 6s
CMake test (with abseil)	5m 7s
CMake msvc (maintainer mode) with C++20	9m 23s
CMake test (with opentracing-shim)	4m 28s
CMake C++14 test(GCC)	4m 48s
CMake C++17 test(GCC)	5m 23s
CMake C++20 test(GCC)	9m 28s
CMake test (without otlp-exporter and with async export)	5m 42s
Bazel	18m 25s
CMake do not install test (with otlp-exporter)	15m 23s
CMake install test (with abseil)	5m 12s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 43s
CMake test (with modern protobuf,grpc and abseil)	17m 50s
CMake C++20 test(Clang with libc++)	9m 50s
CMake test (with otlp-exporter)	15m 15s
CMake C++23 test(Clang with libc++)	9m 27s
CMake C++23 test(GCC)	9m 36s
Plugin -> CMake	1m 18s
Bazel asan config	21m 26s
Bazel without bzlmod	16m 19s
Bazel noexcept	17m 19s
Bazel nortti	18m 2s
Bazel on MacOS	12m 55s
Bazel with async export	18m 20s
Bazel tsan config	19m 8s
Benchmark	14m 7s
Bazel valgrind	21m 5s
Copyright	9s
Format	31s
CMake -> exporter proto	12m 45s
Bazel Windows	41m 32s
Plugin -> CMake Windows	7m 12s
CMake (With async export) -> exporter proto	13m 17s
CMake -> exporter proto (Build as DLL)	19m 53s
Code coverage	12m 50s
DocFX check	1m 4s
markdown-lint	7s
misspell	6s
shellcheck	6s
W3C Distributed Tracing Validation V1	4m 20s
	8h 12m 30s

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