[EXPORTER] Prometheus: Handle attribute key collisions from sanitation #8523

Job	Run time
Bazel asan config	10m 38s
Bazel noexcept	19m 9s
Bazel nortti	18m 27s
Bazel on MacOS	25m 52s
Bazel	23m 31s
Bazel with async export	19m 9s
Bazel tsan config	20m 59s
Bazel with external abseil	20m 31s
Bazel valgrind	24m 0s
Benchmark	12m 27s
CMake test (with abseil)	7m 21s
CMake clang 14 (maintainer mode, async)	17m 38s
CMake clang 14 (maintainer mode, sync)	17m 18s
CMake do not install test (with otlp-exporter)	20m 20s
CMake gcc 4.8 (with otlp exporter)	19m 44s
CMake gcc 4.8 (without otlp exporter)	6m 46s
CMake gcc 12 (maintainer mode, async)	12m 43s
CMake gcc 12 (maintainer mode, C++11, async)	14m 30s
CMake gcc 12 (maintainer mode, sync)	15m 52s
CMake install test (with abseil)	6m 23s
CMake test (with modern protobuf,grpc and abseil)	28m 41s
CMake msvc (maintainer mode)	10m 10s
CMake test (with opentracing-shim)	6m 18s
CMake test (build shared libraries with otlp-exporter and static gRPC)	20m 3s
CMake test (with otlp-exporter)	30m 40s
CMake test (without otlp-exporter)	7m 14s
CMake C++20 test(Clang with libc++)	14m 8s
CMake C++20 test(GCC)	15m 42s
CMake test (without otlp-exporter and with async export)	12m 0s
Code coverage	13m 23s
Copyright	7s
DocFX check	1m 18s
Format	24s
markdown-lint	9s
misspell	4s
Plugin -> CMake	1m 3s
CMake -> exporter proto	17m 17s
Bazel Windows	38m 3s
Plugin -> CMake Windows	9m 16s
CMake (With async export) -> exporter proto	17m 43s
CMake -> exporter proto (Build as DLL)	23m 41s
	10h 0m 42s

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