Provide span for opentracing shim inject (#2535) #80

Job	Run time
Bazel nortti	12m 21s
Bazel noexcept	12m 11s
Bazel asan config	14m 47s
Bazel on MacOS	32m 9s
Bazel	12m 38s
Bazel with async export	12m 51s
Bazel tsan config	13m 9s
Bazel valgrind	14m 23s
Bazel with external abseil	12m 49s
Benchmark	8m 18s
CMake test (with abseil)	4m 31s
CMake clang 15 (maintainer mode, abiv2)	14m 5s
CMake clang 15 (maintainer mode, async)	14m 50s
CMake clang 15 (maintainer mode, sync)	14m 4s
CMake do not install test (with otlp-exporter)	14m 14s
CMake gcc 13 (maintainer mode, async)	7m 7s
CMake gcc 13 (maintainer mode, sync)	6m 38s
CMake test (with modern protobuf,grpc and abseil)	18m 30s
CMake install test (with abseil)	4m 36s
CMake msvc (maintainer mode)	8m 4s
CMake msvc (maintainer mode) with C++20	8m 25s
CMake test (with opentracing-shim)	4m 10s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 13s
CMake test (with otlp-exporter)	13m 44s
CMake test (without otlp-exporter)	5m 10s
CMake C++14 test(GCC)	4m 14s
CMake C++17 test(GCC)	4m 51s
CMake C++20 test(Clang with libc++)	9m 24s
CMake C++20 test(GCC)	8m 43s
CMake C++23 test(GCC)	9m 19s
CMake C++23 test(Clang with libc++)	9m 27s
CMake test (without otlp-exporter and with async export)	6m 4s
Code coverage	11m 28s
Copyright	8s
DocFX check	1m 0s
Format	14s
markdown-lint	7s
misspell	7s
Plugin -> CMake	1m 15s
CMake -> exporter proto	12m 19s
Bazel Windows	19m 24s
Plugin -> CMake Windows	6m 58s
CMake (With async export) -> exporter proto	12m 38s
CMake -> exporter proto (Build as DLL)	24m 35s
	7h 20m 12s

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