[EXPORTER] Error when grpc endpoint is empty #9122

Job	Run time
CMake gcc 13 (maintainer mode, async)	6m 36s
CMake clang 15 (maintainer mode, abiv2)	13m 45s
CMake test (without otlp-exporter)	4m 55s
CMake clang 15 (maintainer mode, async)	13m 57s
CMake clang 15 (maintainer mode, sync)	13m 33s
CMake gcc 13 (maintainer mode, sync)	6m 41s
CMake test (with abseil)	4m 20s
CMake msvc (maintainer mode)	7m 35s
CMake msvc (maintainer mode) with C++20	8m 25s
CMake test (with opentracing-shim)	4m 24s
CMake test (without otlp-exporter and with async export)	4m 59s
CMake do not install test (with otlp-exporter)	13m 53s
CMake test (with modern protobuf,grpc and abseil)	18m 21s
CMake test (with otlp-exporter)	13m 55s
CMake C++14 test(GCC)	4m 31s
CMake C++17 test(GCC)	4m 30s
CMake C++20 test(Clang with libc++)	10m 7s
CMake C++20 test(GCC)	8m 59s
CMake C++23 test(Clang with libc++)	9m 47s
CMake C++23 test(GCC)	9m 13s
Bazel asan config	14m 40s
Bazel noexcept	12m 13s
Bazel nortti	12m 20s
Bazel on MacOS	14m 4s
Bazel	12m 46s
Bazel with async export	12m 14s
Bazel tsan config	12m 41s
Bazel valgrind	13m 59s
Bazel with external abseil	12m 34s
Benchmark	8m 4s
CMake install test (with abseil)	4m 40s
CMake test (build shared libraries with otlp-exporter and static gRPC)	13m 23s
Plugin -> CMake	54s
Code coverage	11m 20s
Copyright	6s
DocFX check	53s
Format	14s
markdown-lint	5s
misspell	7s
CMake -> exporter proto	12m 27s
Bazel Windows	24m 1s
Plugin -> CMake Windows	6m 32s
CMake (With async export) -> exporter proto	12m 38s
CMake -> exporter proto (Build as DLL)	25m 37s
	7h 0m 58s

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