[SDK] Better control of threads executed by opentelemetry-cpp #10747

Job	Run time
CMake test (without otlp-exporter)	4m 52s
CMake clang 18 (maintainer mode, async)	8m 46s
CMake clang 18 (maintainer mode, sync)	8m 34s
CMake gcc 14 (maintainer mode, async)	7m 9s
CMake gcc 14 (maintainer mode, sync)	6m 42s
CMake clang 18 (maintainer mode, abiv2)	8m 38s
CMake msvc (maintainer mode)	7m 18s
CMake msvc (maintainer mode) with C++20	8m 37s
CMake test (without otlp-exporter and with async export)	4m 35s
CMake test (with abseil)	4m 51s
CMake test (with opentracing-shim)	4m 13s
CMake C++14 test(GCC)	4m 46s
CMake C++17 test(GCC)	4m 43s
CMake C++20 test(Clang with libc++)	8m 59s
CMake C++20 test(GCC)	9m 18s
CMake C++23 test(Clang with libc++)	8m 58s
CMake C++23 test(GCC)	8m 17s
CMake do not install test (with otlp-exporter)	14m 50s
CMake install test (with abseil)	4m 55s
CMake test (with modern protobuf,grpc and abseil)	18m 57s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 16s
CMake test (with otlp-exporter)	15m 12s
Plugin -> CMake	1m 5s
Bazel without bzlmod	16m 59s
Bazel	16m 45s
Bazel with async export	17m 22s
Bazel valgrind	10m 22s
Bazel asan config	20m 3s
Bazel noexcept	16m 59s
Bazel nortti	16m 40s
Bazel on MacOS	12m 17s
Bazel tsan config	17m 16s
Benchmark	12m 54s
Copyright	7s
Format	35s
CMake -> exporter proto	11m 41s
CMake -> exporter proto (Build as DLL)	25m 42s
Code coverage	11m 5s
markdown-lint	9s
Bazel Windows	34m 43s
Plugin -> CMake Windows	6m 2s
CMake (With async export) -> exporter proto	14m 15s
DocFX check	1m 4s
misspell	3s
W3C Distributed Tracing Validation V1	3m 59s
shellcheck	6s
	7h 35m 39s

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