[EXPORTER] Prometheus: Add unit to names, convert to word #8784

Job	Run time
CMake clang 14 (maintainer mode, abiv2)	13m 37s
CMake clang 14 (maintainer mode, async)	13m 56s
CMake clang 14 (maintainer mode, sync)	13m 51s
CMake test (with abseil)	4m 29s
CMake gcc 12 (maintainer mode, async)	7m 55s
CMake gcc 12 (maintainer mode, sync)	8m 3s
CMake msvc (maintainer mode)	7m 14s
CMake test (with opentracing-shim)	4m 13s
CMake test (with otlp-exporter)	14m 20s
CMake test (without otlp-exporter)	4m 35s
CMake C++14 test(GCC)	4m 17s
CMake C++17 test(GCC)	4m 37s
CMake C++20 test(Clang with libc++)	9m 29s
CMake C++20 test(GCC)	8m 17s
CMake test (without otlp-exporter and with async export)	4m 46s
Bazel noexcept	12m 2s
Bazel	12m 34s
Bazel with async export	12m 51s
Bazel valgrind	14m 19s
Bazel with external abseil	12m 42s
CMake do not install test (with otlp-exporter)	14m 56s
CMake install test (with abseil)	4m 23s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 10s
CMake test (with modern protobuf,grpc and abseil)	18m 7s
Plugin -> CMake	1m 5s
Bazel asan config	11m 43s
Bazel nortti	12m 42s
Bazel on MacOS	23m 54s
Bazel tsan config	13m 24s
Benchmark	8m 16s
Code coverage	11m 47s
Copyright	5s
DocFX check	1m 4s
Format	11s
markdown-lint	5s
misspell	3s
CMake -> exporter proto	13m 6s
Bazel Windows	24m 2s
Plugin -> CMake Windows	7m 39s
CMake (With async export) -> exporter proto	12m 49s
CMake -> exporter proto (Build as DLL)	13m 1s
	6h 34m 39s

Provide feedback