Add an option to dump wal seqno gaps #2771

Job	Run time
build-linux-cmake-mingw	12m 6s
build-linux	16m 24s
build-linux-cmake-with-benchmark	19m 27s
check-format-and-targets	23s
build-linux-cmake-with-folly	27m 53s
build-linux-cmake-with-folly-coroutines	31m 26s
build-linux-encrypted_env-no_compression	15m 29s
build-linux-make-with-folly	27m 54s
build-linux-make-with-folly-lite-no-test	9m 23s
build-linux-release	13m 51s
build-linux-release-rtti	12m 7s
build-examples	10m 26s
build-fuzzers	8m 30s
build-linux-clang-13-no_test_run	7m 3s
build-linux-clang-no_test_run	11m 48s
build-linux-cmake-with-folly-lite-no-test	8m 6s
build-linux-gcc-11-no_test_run	9m 59s
build-linux-gcc-10-cxx20-no_test_run	9m 22s
build-linux-gcc-8-no_test_run	8m 40s
build-linux-arm	14m 11s
build-linux-clang10-asan	16m 42s
build-linux-clang10-clang-analyze	17m 6s
build-linux-clang10-mini-tsan	23m 51s
build-linux-clang10-ubsan	16m 1s
build-linux-java	15m 2s
build-linux-java-pmd	11m 45s
build-linux-java-static	11m 26s
build-linux-mini-crashtest	29m 34s
build-linux-static_lib-alt_namespace-status_checked	18m 52s
build-linux-unity-and-headers	12m 50s
build-macos	17m 41s
build-macos-cmake (true)	37m 31s
build-macos-java	16m 59s
build-macos-cmake (false)	41m 0s
build-macos-java-static	18m 8s
build-macos-java-static-universal	4m 42s
build-windows-vs2019	53m 50s
	10h 37m 28s

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