Support import/export database with indexes #14751

Job	Run time
python lint check	31s
sanity checks	11s
clang format	37s
rustfmt check	11s
rust build & test	51m 4s
clang tidy & clangd diagnostics check	15m 7s
shell test	13m 28s
generate binary dataset	1m 18s
webassembly build & test	23m 51s
gcc build & test	13m 47s
code coverage	33m 13s
clang build & test	12m 43s
apple clang build & test	9m 6s
msvc build & test	34m 7s
macos extension test	1m 33s
clang build & test with page_size_log2=16	7m 0s
clang build & test with page_size_log2=18	11m 30s
gcc build & test in-mem only with various vector size	6m 12s
gcc build & test with asan	31m 4s
linux extension test	24m 3s
benchmark / benchmark	31m 4s
windows extension test	7m 56s
report benchmark result	6s
	5h 29m 42s

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