[SEMCONV] Metrics are incorrectly prefixed with `metric.` #10888

Job	Run time
CMake gcc 14 (maintainer mode, async)	8m 55s
CMake test (without otlp-exporter)	6m 58s
CMake test (with abseil)	5m 29s
CMake clang 18 (maintainer mode, abiv2)	9m 45s
CMake clang 18 (maintainer mode, async)	9m 38s
CMake clang 18 (maintainer mode, sync)	9m 40s
CMake gcc 14 (maintainer mode, sync)	7m 27s
CMake msvc (maintainer mode)	8m 27s
CMake test (without otlp-exporter and with async export)	5m 51s
Bazel	17m 34s
CMake do not install test (with otlp-exporter)	15m 8s
CMake install test (with abseil)	4m 53s
CMake test (with modern protobuf,grpc and abseil)	18m 20s
CMake msvc (maintainer mode) with C++20	8m 45s
CMake test (with opentracing-shim)	4m 31s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 53s
CMake test (with otlp-exporter)	15m 24s
CMake C++14 test(GCC)	4m 41s
CMake C++17 test(GCC)	5m 20s
CMake C++20 test(Clang with libc++)	9m 39s
CMake C++20 test(GCC)	9m 42s
CMake C++23 test(Clang with libc++)	9m 42s
CMake C++23 test(GCC)	9m 11s
Plugin -> CMake	1m 26s
Bazel asan config	21m 49s
Bazel without bzlmod	16m 44s
Bazel noexcept	17m 40s
Bazel nortti	18m 6s
Bazel on MacOS	15m 5s
Bazel with async export	17m 52s
Bazel tsan config	19m 1s
Bazel valgrind	21m 21s
Benchmark	14m 25s
Copyright	6s
Format	31s
CMake -> exporter proto	13m 9s
Bazel Windows	34m 3s
Plugin -> CMake Windows	7m 57s
CMake (With async export) -> exporter proto	14m 27s
CMake -> exporter proto (Build as DLL)	28m 55s
Code coverage	12m 11s
DocFX check	1m 12s
markdown-lint	6s
misspell	3s
shellcheck	4s
W3C Distributed Tracing Validation V1	3m 52s
	8h 19m 58s

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