[SDK] Avoid missing conditional variable update and simplify atomic bool #9581

Job	Run time
Bazel nortti	12m 36s
Bazel noexcept	12m 31s
Bazel asan config	15m 35s
Bazel on MacOS	11m 2s
Bazel	13m 20s
Bazel with async export	12m 48s
Bazel tsan config	13m 41s
Bazel valgrind	14m 35s
Bazel with external abseil	13m 23s
Benchmark	8m 17s
CMake test (with abseil)	4m 26s
CMake clang 15 (maintainer mode, abiv2)	14m 56s
CMake clang 15 (maintainer mode, async)	14m 43s
CMake clang 15 (maintainer mode, sync)	14m 55s
CMake do not install test (with otlp-exporter)	14m 14s
CMake gcc 13 (maintainer mode, async)	7m 9s
CMake gcc 13 (maintainer mode, sync)	7m 22s
CMake install test (with abseil)	4m 21s
CMake test (with modern protobuf,grpc and abseil)	18m 24s
CMake msvc (maintainer mode)	6m 47s
CMake msvc (maintainer mode) with C++20	8m 31s
CMake test (with opentracing-shim)	4m 35s
CMake test (build shared libraries with otlp-exporter and static gRPC)	13m 58s
CMake test (with otlp-exporter)	14m 33s
CMake test (without otlp-exporter)	4m 51s
CMake C++14 test(GCC)	4m 11s
CMake C++17 test(GCC)	4m 50s
CMake C++20 test(Clang with libc++)	9m 13s
CMake C++20 test(GCC)	8m 27s
CMake C++23 test(Clang with libc++)	9m 44s
CMake C++23 test(GCC)	8m 23s
CMake test (without otlp-exporter and with async export)	4m 52s
Code coverage	11m 23s
Copyright	7s
DocFX check	33s
Format	14s
markdown-lint	7s
misspell	3s
Plugin -> CMake	1m 9s
shellcheck	7s
CMake -> exporter proto	12m 34s
Bazel Windows	21m 41s
Plugin -> CMake Windows	6m 45s
CMake (With async export) -> exporter proto	12m 42s
CMake -> exporter proto (Build as DLL)	29m 53s
	7h 8m 31s

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