Steps toward deprecating implicit prefix seek, related fixes #2830

Job	Run time
build-fuzzers	8m 42s
build-linux	16m 28s
build-examples	10m 0s
build-linux-arm	14m 52s
build-linux-clang10-asan	16m 51s
build-linux-clang10-clang-analyze	17m 45s
build-linux-clang10-mini-tsan	21m 24s
build-linux-clang10-ubsan	16m 37s
build-linux-clang-13-no_test_run	7m 32s
build-linux-clang-no_test_run	12m 1s
build-linux-cmake-mingw	11m 39s
build-linux-cmake-with-benchmark	18m 34s
build-linux-cmake-with-folly	26m 9s
build-linux-cmake-with-folly-coroutines	30m 12s
build-linux-cmake-with-folly-lite-no-test	7m 17s
build-linux-encrypted_env-no_compression	15m 32s
build-linux-gcc-10-cxx20-no_test_run	9m 16s
build-linux-gcc-11-no_test_run	10m 28s
build-linux-gcc-8-no_test_run	8m 39s
build-linux-java	10m 1s
build-linux-java-pmd	10m 0s
build-linux-java-static	10m 7s
build-linux-make-with-folly	26m 57s
build-linux-make-with-folly-lite-no-test	8m 56s
build-linux-mini-crashtest	28m 24s
build-linux-release	13m 45s
build-linux-release-rtti	11m 41s
build-linux-static_lib-alt_namespace-status_checked	18m 20s
build-linux-unity-and-headers	12m 37s
build-macos	31m 2s
build-macos-cmake (true)	58m 46s
build-macos-java	14m 53s
build-macos-cmake (false)	51m 59s
build-macos-java-static	11m 21s
build-macos-java-static-universal	14m 26s
build-windows-vs2019	40m 8s
check-format-and-targets	23s
	10h 53m 44s

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