[EXPORTER] OTLP: Fix missing ResourceMetrics SchemaURL #9318

Job	Run time
Bazel noexcept	12m 7s
Bazel asan config	14m 26s
Bazel nortti	12m 42s
Bazel on MacOS	16m 28s
Bazel	12m 14s
Bazel with async export	12m 17s
Bazel tsan config	12m 38s
Bazel valgrind	13m 47s
Bazel with external abseil	12m 30s
Benchmark	8m 20s
CMake test (with abseil)	4m 36s
CMake clang 15 (maintainer mode, abiv2)	13m 44s
CMake clang 15 (maintainer mode, async)	14m 9s
CMake clang 15 (maintainer mode, sync)	13m 59s
CMake do not install test (with otlp-exporter)	13m 46s
CMake gcc 13 (maintainer mode, async)	6m 39s
CMake gcc 13 (maintainer mode, sync)	6m 52s
CMake install test (with abseil)	4m 38s
CMake test (with modern protobuf,grpc and abseil)	18m 28s
CMake msvc (maintainer mode)	8m 14s
CMake msvc (maintainer mode) with C++20	8m 22s
CMake test (build shared libraries with otlp-exporter and static gRPC)	13m 53s
CMake test (with otlp-exporter)	14m 13s
CMake test (with opentracing-shim)	5m 9s
CMake test (without otlp-exporter)	5m 3s
CMake C++14 test(GCC)	3m 59s
CMake C++17 test(GCC)	4m 33s
CMake C++20 test(Clang with libc++)	10m 2s
CMake C++20 test(GCC)	8m 50s
CMake C++23 test(Clang with libc++)	9m 29s
CMake C++23 test(GCC)	9m 0s
CMake test (without otlp-exporter and with async export)	4m 57s
Code coverage	11m 47s
Copyright	5s
DocFX check	52s
Format	14s
markdown-lint	7s
misspell	7s
Plugin -> CMake	1m 10s
CMake -> exporter proto	12m 26s
Bazel Windows	21m 7s
Plugin -> CMake Windows	6m 37s
CMake (With async export) -> exporter proto	12m 1s
CMake -> exporter proto (Build as DLL)	25m 13s
	7h 1m 50s

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