[EXPORTER] Prometheus cleanup, test with TranslateToPrometheus #8530

Job	Run time
Bazel nortti	18m 50s
Bazel on MacOS	27m 52s
Bazel noexcept	19m 58s
Bazel asan config	11m 52s
Bazel	22m 21s
Bazel with async export	20m 41s
Bazel tsan config	25m 4s
Bazel valgrind	24m 50s
Bazel with external abseil	19m 4s
Benchmark	16m 51s
CMake test (with abseil)	9m 33s
CMake clang 14 (maintainer mode, async)	24m 43s
CMake clang 14 (maintainer mode, sync)	21m 16s
CMake do not install test (with otlp-exporter)	22m 16s
CMake gcc 4.8 (without otlp exporter)	5m 56s
CMake gcc 4.8 (with otlp exporter)	17m 15s
CMake gcc 12 (maintainer mode, async)	13m 13s
CMake gcc 12 (maintainer mode, C++11, async)	10m 48s
CMake gcc 12 (maintainer mode, sync)	13m 25s
CMake install test (with abseil)	7m 58s
CMake test (with modern protobuf,grpc and abseil)	28m 30s
CMake msvc (maintainer mode)	12m 34s
CMake test (with opentracing-shim)	5m 56s
CMake test (build shared libraries with otlp-exporter and static gRPC)	19m 58s
CMake test (with otlp-exporter)	30m 31s
CMake test (without otlp-exporter)	6m 45s
CMake C++20 test(Clang with libc++)	11m 26s
CMake test (without otlp-exporter and with async export)	7m 36s
CMake C++20 test(GCC)	13m 50s
Code coverage	13m 11s
Copyright	7s
DocFX check	2m 5s
Format	22s
markdown-lint	9s
misspell	6s
Plugin -> CMake	1m 7s
CMake -> exporter proto	24m 41s
Bazel Windows	35m 11s
Plugin -> CMake Windows	11m 8s
CMake (With async export) -> exporter proto	20m 27s
CMake -> exporter proto (Build as DLL)	16m 54s
	10h 16m 20s

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