[EXPORTER] Error when grpc endpoint is empty #9113

Job	Run time
CMake test (without otlp-exporter)	5m 0s
CMake test (with abseil)	4m 33s
CMake clang 15 (maintainer mode, abiv2)	13m 42s
CMake clang 15 (maintainer mode, async)	13m 45s
CMake clang 15 (maintainer mode, sync)	13m 34s
CMake gcc 13 (maintainer mode, async)	6m 35s
CMake gcc 13 (maintainer mode, sync)	7m 4s
CMake msvc (maintainer mode)	6m 54s
CMake msvc (maintainer mode) with C++20	8m 8s
CMake test (without otlp-exporter and with async export)	4m 33s
CMake do not install test (with otlp-exporter)	13m 47s
CMake install test (with abseil)	4m 37s
CMake test (with modern protobuf,grpc and abseil)	18m 29s
CMake test (with opentracing-shim)	4m 8s
CMake test (build shared libraries with otlp-exporter and static gRPC)	14m 6s
CMake test (with otlp-exporter)	13m 39s
CMake C++14 test(GCC)	4m 0s
CMake C++17 test(GCC)	5m 17s
CMake C++20 test(Clang with libc++)	9m 11s
CMake C++23 test(Clang with libc++)	9m 12s
CMake C++20 test(GCC)	8m 32s
CMake C++23 test(GCC)	8m 34s
Bazel asan config	15m 2s
Bazel nortti	12m 35s
Bazel noexcept	11m 51s
Bazel on MacOS	32m 56s
Bazel	12m 25s
Bazel with async export	12m 25s
Bazel tsan config	13m 47s
Bazel valgrind	14m 5s
Bazel with external abseil	12m 30s
Benchmark	7m 58s
Copyright	6s
Format	13s
Plugin -> CMake	57s
CMake -> exporter proto	11m 52s
CMake -> exporter proto (Build as DLL)	24m 22s
Code coverage	11m 51s
DocFX check	54s
markdown-lint	7s
misspell	3s
Bazel Windows	21m 52s
Plugin -> CMake Windows	5m 58s
CMake (With async export) -> exporter proto	11m 42s
	7h 12m 51s

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