[BUILD] Accept path list in OPENTELEMETRY_EXTERNAL_COMPONENT_PATH #8871

Job	Run time
CMake clang 14 (maintainer mode, abiv2)	13m 36s
CMake clang 14 (maintainer mode, async)	13m 32s
CMake clang 14 (maintainer mode, sync)	13m 45s
CMake gcc 12 (maintainer mode, async)	8m 9s
CMake gcc 12 (maintainer mode, sync)	8m 12s
CMake test (without otlp-exporter)	4m 44s
CMake test (with abseil)	4m 39s
CMake do not install test (with otlp-exporter)	14m 16s
CMake install test (with abseil)	4m 18s
CMake test (with modern protobuf,grpc and abseil)	18m 57s
CMake msvc (maintainer mode)	7m 32s
CMake test (with opentracing-shim)	4m 20s
CMake test (build shared libraries with otlp-exporter and static gRPC)	13m 37s
CMake test (with otlp-exporter)	14m 17s
CMake C++14 test(GCC)	4m 2s
CMake C++17 test(GCC)	4m 41s
CMake C++20 test(Clang with libc++)	9m 15s
CMake C++20 test(GCC)	8m 16s
CMake test (without otlp-exporter and with async export)	4m 32s
Bazel asan config	14m 50s
Bazel noexcept	11m 56s
Bazel nortti	12m 9s
Bazel on MacOS	19m 10s
Bazel	12m 26s
Bazel with async export	12m 35s
Bazel tsan config	12m 52s
Bazel valgrind	14m 20s
Bazel with external abseil	12m 3s
Benchmark	8m 9s
Copyright	5s
Format	16s
Plugin -> CMake	1m 1s
CMake -> exporter proto	12m 30s
Code coverage	12m 1s
DocFX check	55s
markdown-lint	6s
misspell	3s
Bazel Windows	17m 43s
Plugin -> CMake Windows	6m 58s
CMake (With async export) -> exporter proto	12m 0s
CMake -> exporter proto (Build as DLL)	12m 46s
	6h 21m 34s

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