Add statistic to track compaction prefetching memory usage #4014

Job	Run time
check-format-and-targets	26s
build-linux-cmake-mingw	11m 55s
build-linux	1h 32m 40s
build-linux-cmake-with-folly	30m 48s
build-fuzzers	8m 53s
build-linux-clang10-asan	43m 15s
build-examples	10m 4s
build-linux-clang10-clang-analyze	17m 52s
build-linux-clang10-ubsan	10m 5s
build-linux-clang13-mini-tsan	2h 35m 15s
build-linux-clang-13-no_test_run	7m 33s
build-linux-clang-no_test_run	12m 16s
build-linux-cmake-with-benchmark	22m 48s
build-linux-cmake-with-folly-coroutines	34m 47s
build-linux-cmake-with-folly-lite-no-test	7m 27s
build-linux-encrypted_env-no_compression	29m 26s
build-linux-gcc-10-cxx20-no_test_run	9m 10s
build-linux-gcc-11-no_test_run	10m 33s
build-linux-gcc-8-no_test_run	8m 41s
build-linux-java	11m 12s
build-linux-make-with-folly	1h 27m 38s
build-linux-make-with-folly-lite-no-test	9m 46s
build-linux-mini-crashtest	11m 56s
build-linux-release	13m 55s
build-linux-release-rtti	12m 3s
build-linux-static_lib-alt_namespace-status_checked	1h 28m 30s
build-linux-unity-and-headers	6m 59s
build-macos	22m 29s
build-macos-cmake (true)	1h 55m 24s
build-windows-vs2019	43m 15s
build-macos-cmake (false)	1h 54m 45s
build-linux-arm	11m 47s
build-linux-java-pmd	11m 28s
build-linux-java-static	10m 58s
build-macos-java	11m 34s
build-macos-java-static	23m 0s
build-macos-java-static-universal	29m 3s
	19h 19m 36s

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