[SDK] Better control of threads executed by opentelemetry-cpp #10792

Job	Run time
Bazel asan config	24m 4s
Bazel without bzlmod	19m 16s
Bazel noexcept	19m 14s
Bazel nortti	19m 27s
Bazel on MacOS	16m 17s
Bazel	19m 39s
Bazel with async export	20m 49s
Bazel tsan config	20m 49s
Bazel valgrind	22m 5s
Benchmark	15m 45s
CMake test (with abseil)	4m 55s
CMake clang 18 (maintainer mode, abiv2)	8m 44s
CMake clang 18 (maintainer mode, async)	8m 35s
CMake clang 18 (maintainer mode, sync)	8m 28s
CMake do not install test (with otlp-exporter)	14m 40s
CMake gcc 14 (maintainer mode, async)	6m 55s
CMake install test (with abseil)	4m 46s
CMake gcc 14 (maintainer mode, sync)	7m 14s
CMake test (with modern protobuf,grpc and abseil)	20m 22s
CMake msvc (maintainer mode)	7m 26s
CMake test (with opentracing-shim)	4m 33s
CMake msvc (maintainer mode) with C++20	8m 40s
CMake test (build shared libraries with otlp-exporter and static gRPC)	15m 6s
CMake test (with otlp-exporter)	14m 30s
CMake test (without otlp-exporter)	52s
CMake C++14 test(GCC)	4m 12s
CMake C++17 test(GCC)	5m 1s
CMake C++20 test(Clang with libc++)	1m 57s
CMake C++20 test(GCC)	9m 4s
CMake C++23 test(Clang with libc++)	51s
CMake C++23 test(GCC)	11m 16s
CMake test (without otlp-exporter and with async export)	50s
Code coverage	47s
Copyright	9s
DocFX check	32s
Format	27s
markdown-lint	8s
misspell	7s
Plugin -> CMake	35s
shellcheck	4s
W3C Distributed Tracing Validation V1	36s
CMake -> exporter proto	11m 46s
Bazel Windows	33m 34s
Plugin -> CMake Windows	6m 8s
CMake (With async export) -> exporter proto	11m 47s
CMake -> exporter proto (Build as DLL)	26m 50s
	7h 39m 52s

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