[REMOVAL] Drop C++11 support (#2342) #8599

Job	Run time
CMake clang 14 (maintainer mode, abiv2)	17m 17s
CMake clang 14 (maintainer mode, async)	20m 36s
CMake clang 14 (maintainer mode, sync)	17m 12s
CMake gcc 12 (maintainer mode, async)	11m 22s
CMake gcc 12 (maintainer mode, sync)	10m 59s
CMake test (without otlp-exporter)	6m 57s
CMake test (with abseil)	6m 39s
CMake do not install test (with otlp-exporter)	21m 18s
CMake install test (with abseil)	7m 36s
CMake test (with modern protobuf,grpc and abseil)	28m 53s
CMake msvc (maintainer mode)	16m 51s
CMake test (with opentracing-shim)	6m 32s
CMake test (build shared libraries with otlp-exporter and static gRPC)	21m 19s
CMake test (with otlp-exporter)	20m 7s
CMake C++14 test(GCC)	7m 15s
CMake C++17 test(GCC)	6m 25s
CMake C++20 test(Clang with libc++)	16m 25s
CMake C++20 test(GCC)	12m 17s
CMake test (without otlp-exporter and with async export)	7m 7s
Bazel asan config	13m 13s
Bazel noexcept	20m 7s
Bazel nortti	18m 56s
Bazel on MacOS	27m 10s
Bazel	18m 44s
Bazel with async export	19m 56s
Bazel tsan config	19m 52s
Bazel valgrind	23m 27s
Bazel with external abseil	27m 27s
Benchmark	12m 0s
Copyright	9s
Format	18s
Plugin -> CMake	1m 48s
CMake -> exporter proto	23m 35s
CMake (With async export) -> exporter proto	19m 53s
CMake -> exporter proto (Build as DLL)	17m 45s
Code coverage	18m 32s
DocFX check	1m 14s
markdown-lint	10s
misspell	4s
Bazel Windows	32m 51s
Plugin -> CMake Windows	9m 21s
	9h 49m 39s

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