[EXEMPLAR] Update ExemplarFilter and ExemplarReservoir for spec #9408

Job	Run time
CMake clang 15 (maintainer mode, async)	9m 22s
CMake clang 15 (maintainer mode, sync)	9m 11s
CMake gcc 13 (maintainer mode, async)	7m 18s
CMake gcc 13 (maintainer mode, sync)	6m 37s
CMake test (without otlp-exporter)	4m 34s
CMake test (with abseil)	4m 26s
CMake clang 15 (maintainer mode, abiv2)	9m 15s
CMake msvc (maintainer mode)	6m 10s
CMake msvc (maintainer mode) with C++20	6m 52s
CMake test (with opentracing-shim)	2m 2s
CMake C++14 test(GCC)	4m 13s
CMake C++17 test(GCC)	4m 36s
CMake test (without otlp-exporter and with async export)	4m 45s
CMake do not install test (with otlp-exporter)	10m 35s
CMake install test (with abseil)	4m 14s
CMake test (with modern protobuf,grpc and abseil)	14m 28s
CMake test (build shared libraries with otlp-exporter and static gRPC)	10m 27s
CMake test (with otlp-exporter)	10m 18s
CMake C++20 test(Clang with libc++)	4m 2s
CMake C++20 test(GCC)	3m 14s
CMake C++23 test(Clang with libc++)	3m 54s
CMake C++23 test(GCC)	3m 27s
Plugin -> CMake	56s
Bazel asan config	12m 6s
Bazel noexcept	10m 19s
Bazel nortti	4m 1s
Bazel on MacOS	15m 12s
Bazel	10m 11s
Bazel with async export	10m 19s
Bazel tsan config	10m 42s
Bazel valgrind	10m 55s
Bazel with external abseil	10m 28s
Benchmark	1m 25s
Code coverage	2m 52s
Copyright	4s
DocFX check	56s
Format	13s
markdown-lint	7s
misspell	4s
CMake -> exporter proto	9m 25s
Plugin -> CMake Windows	5m 40s
CMake (With async export) -> exporter proto	8m 42s
Bazel Windows	7m 34s
CMake -> exporter proto (Build as DLL)	13m 23s
	4h 49m 34s

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