[SDK] Better control of threads executed by opentelemetry-cpp #10836

Job	Run time
CMake test (with abseil)	5m 12s
CMake clang 18 (maintainer mode, abiv2)	9m 43s
CMake clang 18 (maintainer mode, async)	10m 18s
CMake clang 18 (maintainer mode, sync)	9m 54s
CMake gcc 14 (maintainer mode, async)	7m 48s
CMake gcc 14 (maintainer mode, sync)	7m 46s
CMake msvc (maintainer mode) with C++20	10m 38s
CMake msvc (maintainer mode)	9m 14s
CMake test (with opentracing-shim)	4m 55s
CMake test (without otlp-exporter)	5m 40s
CMake C++14 test(GCC)	4m 39s
CMake C++17 test(GCC)	5m 29s
CMake C++20 test(Clang with libc++)	10m 8s
CMake C++20 test(GCC)	9m 34s
CMake C++23 test(GCC)	9m 51s
CMake test (without otlp-exporter and with async export)	6m 12s
Bazel asan config	20m 20s
Bazel without bzlmod	16m 43s
Bazel noexcept	16m 11s
Bazel nortti	16m 51s
Bazel	17m 18s
Bazel on MacOS	13m 55s
Bazel with async export	17m 4s
Bazel tsan config	17m 23s
Bazel valgrind	19m 47s
Benchmark	13m 11s
CMake do not install test (with otlp-exporter)	15m 12s
CMake install test (with abseil)	5m 17s
CMake test (with modern protobuf,grpc and abseil)	17m 23s
CMake test (build shared libraries with otlp-exporter and static gRPC)	15m 19s
CMake test (with otlp-exporter)	15m 1s
CMake C++23 test(Clang with libc++)	9m 44s
Copyright	8s
Format	30s
CMake -> exporter proto	14m 8s
Plugin -> CMake	1m 15s
CMake (With async export) -> exporter proto	13m 29s
CMake -> exporter proto (Build as DLL)	27m 21s
Code coverage	12m 41s
DocFX check	1m 48s
markdown-lint	7s
misspell	4s
shellcheck	8s
W3C Distributed Tracing Validation V1	3m 58s
Bazel Windows	33m 10s
Plugin -> CMake Windows	7m 31s
	8h 9m 58s

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