Mark logs signal as stable API/SDK #8296

Job	Run time
CMake gcc 12 (maintainer mode, async)	18m 54s
CMake gcc 12 (maintainer mode, C++11, async)	15m 40s
CMake test (with abseil)	6m 27s
CMake clang 14 (maintainer mode, async)	20m 25s
CMake clang 14 (maintainer mode, sync)	19m 38s
CMake gcc 4.8 (with otlp exporter)	13m 52s
CMake gcc 4.8 (without otlp exporter)	5m 34s
CMake gcc 12 (maintainer mode, sync)	21m 50s
CMake msvc (maintainer mode)	14m 6s
CMake test (with opentracing-shim)	7m 50s
CMake test (without otlp-exporter)	6m 36s
CMake C++20 test(Clang with libc++)	11m 39s
CMake C++20 test(GCC)	11m 51s
CMake test (without otlp-exporter and with async export)	9m 32s
Bazel asan config	28m 51s
Bazel noexcept	19m 33s
Bazel nortti	19m 2s
Bazel on MacOS	31m 29s
Bazel	20m 30s
Bazel with async export	23m 44s
Bazel tsan config	25m 8s
Bazel valgrind	27m 49s
Bazel with external abseil	23m 38s
CMake do not install test (with otlp-exporter)	20m 36s
CMake test (build shared libraries with otlp-exporter and static gRPC)	29m 22s
CMake test (with otlp-exporter)	24m 55s
Plugin -> CMake	1m 23s
Benchmark	12m 53s
Copyright	7s
DocFX check	54s
Code coverage	16m 26s
Format	19s
markdown-lint	6s
misspell	5s
CMake -> exporter proto	20m 0s
Bazel Windows	37m 7s
Plugin -> CMake Windows	10m 20s
CMake (With async export) -> exporter proto	20m 47s
CMake -> exporter proto (Build as DLL)	15m 38s
	10h 14m 36s

Provide feedback