Add stress testing framework, with basic metrics example to demonstrate. #10981

Job	Run time
CMake clang 18 (maintainer mode, abiv2)	9m 50s
CMake clang 18 (maintainer mode, async)	9m 47s
CMake clang 18 (maintainer mode, sync)	9m 55s
CMake gcc 14 (maintainer mode, async)	7m 29s
CMake gcc 14 (maintainer mode, sync)	8m 4s
CMake test (without otlp-exporter)	5m 43s
CMake test (with abseil)	5m 14s
CMake msvc (maintainer mode)	7m 50s
CMake msvc (maintainer mode) with C++20	8m 40s
CMake test (with opentracing-shim)	4m 36s
CMake C++17 test(GCC)	5m 18s
CMake C++14 test(GCC)	5m 20s
CMake C++20 test(Clang with libc++)	9m 54s
CMake C++20 test(GCC)	9m 50s
CMake test (without otlp-exporter and with async export)	5m 52s
Bazel asan config	21m 11s
Bazel without bzlmod	16m 35s
Bazel noexcept	17m 6s
Bazel nortti	17m 30s
Bazel	18m 5s
Bazel with async export	18m 30s
Bazel valgrind	20m 58s
CMake do not install test (with otlp-exporter)	15m 45s
CMake install test (with abseil)	5m 22s
CMake test (with modern protobuf,grpc and abseil)	17m 54s
CMake test (build shared libraries with otlp-exporter and static gRPC)	15m 14s
CMake test (with otlp-exporter)	15m 19s
CMake C++23 test(Clang with libc++)	9m 30s
CMake C++23 test(GCC)	9m 18s
Plugin -> CMake	1m 30s
Bazel on MacOS	14m 36s
Bazel tsan config	19m 6s
Benchmark	14m 16s
Code coverage	12m 20s
Copyright	6s
DocFX check	1m 7s
Format	27s
markdown-lint	8s
misspell	4s
shellcheck	3s
CMake -> exporter proto	13m 17s
Bazel Windows	36m 0s
Plugin -> CMake Windows	7m 5s
CMake (With async export) -> exporter proto	13m 47s
CMake -> exporter proto (Build as DLL)	27m 18s
W3C Distributed Tracing Validation V1	4m 53s
	8h 17m 42s

Provide feedback