[EXPORTER] Set is_monotonic flag for Observable Counters (#2478) #8988

Job	Run time
Bazel noexcept	11m 48s
Bazel asan config	15m 11s
Bazel nortti	12m 30s
Bazel on MacOS	25m 24s
Bazel	12m 13s
Bazel with async export	12m 38s
Bazel tsan config	13m 10s
Bazel valgrind	14m 0s
Bazel with external abseil	12m 16s
Benchmark	7m 46s
CMake test (with abseil)	4m 52s
CMake clang 14 (maintainer mode, abiv2)	13m 51s
CMake clang 14 (maintainer mode, async)	13m 46s
CMake clang 14 (maintainer mode, sync)	14m 7s
CMake do not install test (with otlp-exporter)	14m 8s
CMake gcc 12 (maintainer mode, async)	8m 2s
CMake gcc 12 (maintainer mode, sync)	8m 8s
CMake install test (with abseil)	4m 18s
CMake test (with modern protobuf,grpc and abseil)	18m 1s
CMake msvc (maintainer mode)	7m 26s
CMake msvc (maintainer mode) with C++20	8m 49s
CMake test (with opentracing-shim)	4m 31s
CMake test (build shared libraries with otlp-exporter and static gRPC)	13m 44s
CMake test (with otlp-exporter)	13m 54s
CMake test (without otlp-exporter)	4m 38s
CMake C++14 test(GCC)	3m 58s
CMake C++17 test(GCC)	4m 37s
CMake C++20 test(Clang with libc++)	9m 25s
CMake C++20 test(GCC)	8m 19s
CMake test (without otlp-exporter and with async export)	4m 32s
Code coverage	11m 54s
Copyright	5s
DocFX check	55s
Format	14s
markdown-lint	6s
misspell	4s
Plugin -> CMake	1m 4s
CMake -> exporter proto	12m 15s
Bazel Windows	22m 42s
Plugin -> CMake Windows	7m 3s
CMake (With async export) -> exporter proto	12m 4s
CMake -> exporter proto (Build as DLL)	12m 17s
	6h 40m 45s

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