[EXPORTER] Fix forward protocol encoding for ETW exporter #8966

Job	Run time
CMake clang 14 (maintainer mode, abiv2)	13m 31s
CMake clang 14 (maintainer mode, sync)	13m 30s
CMake clang 14 (maintainer mode, async)	14m 13s
CMake gcc 12 (maintainer mode, async)	8m 0s
CMake msvc (maintainer mode)	7m 23s
CMake msvc (maintainer mode) with C++20	7m 48s
CMake gcc 12 (maintainer mode, sync)	7m 50s
CMake test (without otlp-exporter)	4m 59s
CMake test (with abseil)	4m 44s
CMake do not install test (with otlp-exporter)	13m 39s
CMake test (with modern protobuf,grpc and abseil)	18m 28s
CMake test (with opentracing-shim)	4m 23s
CMake test (with otlp-exporter)	14m 6s
CMake C++14 test(GCC)	4m 20s
CMake C++17 test(GCC)	4m 27s
CMake C++20 test(Clang with libc++)	9m 33s
CMake C++20 test(GCC)	8m 34s
CMake test (without otlp-exporter and with async export)	4m 28s
Bazel asan config	14m 50s
Bazel noexcept	11m 42s
Bazel nortti	12m 16s
Bazel on MacOS	19m 5s
Bazel	12m 16s
Bazel with async export	12m 25s
Bazel tsan config	12m 55s
Bazel valgrind	13m 20s
Bazel with external abseil	12m 30s
Benchmark	7m 56s
CMake install test (with abseil)	4m 51s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 12s
Format	15s
Plugin -> CMake	53s
Code coverage	11m 53s
Copyright	5s
DocFX check	1m 13s
markdown-lint	7s
misspell	4s
CMake -> exporter proto	12m 31s
Bazel Windows	19m 7s
Plugin -> CMake Windows	6m 33s
CMake (With async export) -> exporter proto	11m 44s
CMake -> exporter proto (Build as DLL)	12m 44s
	6h 29m 23s

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