Mark logs signal as stable API/SDK #8308

Job	Run time
Bazel noexcept	25m 40s
Bazel asan config	29m 22s
Bazel nortti	22m 50s
Bazel on MacOS	7m 45s
Bazel	23m 21s
Bazel with async export	20m 1s
Bazel tsan config	22m 22s
Bazel valgrind	22m 58s
Bazel with external abseil	21m 11s
Benchmark	15m 30s
CMake test (with abseil)	6m 26s
CMake clang 14 (maintainer mode, async)	25m 34s
CMake clang 14 (maintainer mode, sync)	24m 49s
CMake do not install test (with otlp-exporter)	23m 22s
CMake gcc 4.8 (with otlp exporter)	14m 44s
CMake gcc 12 (maintainer mode, async)	15m 42s
CMake gcc 4.8 (without otlp exporter)	6m 38s
CMake gcc 12 (maintainer mode, C++11, async)	15m 54s
CMake gcc 12 (maintainer mode, sync)	18m 28s
CMake msvc (maintainer mode)	11m 15s
CMake test (with opentracing-shim)	5m 59s
CMake test (build shared libraries with otlp-exporter and static gRPC)	19m 7s
CMake test (with otlp-exporter)	28m 36s
CMake test (without otlp-exporter)	6m 39s
CMake C++20 test(GCC)	12m 42s
CMake C++20 test(Clang with libc++)	13m 42s
CMake test (without otlp-exporter and with async export)	6m 45s
Code coverage	18m 9s
Copyright	6s
DocFX check	1m 3s
Format	14s
markdown-lint	6s
misspell	7s
Plugin -> CMake	1m 42s
CMake -> exporter proto	23m 58s
Bazel Windows	36m 56s
Plugin -> CMake Windows	8m 53s
CMake -> exporter proto (Build as DLL)	17m 25s
CMake (With async export) -> exporter proto	17m 32s
	9h 53m 33s

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