multilayer sstable

[trinity-1686a]

fix #1948
related to quickwit-oss/quickwit#3964

implement a new file format for sstable which allows much faster opening of very large table, at the cost of somewhat slower individual queries to the table
current results:

before:
        ord_to_term_suffix           time:   [15.442 µs 15.452 µs 15.464 µs]
        open_and_ord_to_term_suffix  time:   [37.591 ms 37.638 ms 37.688 ms]
        ord_to_term                  time:   [65.466 µs 65.483 µs 65.503 µs]
        open_and_ord_to_term         time:   [8.6174 ms 8.6311 ms 8.6474 ms]
after:
        ord_to_term_suffix           time:   [41.148 µs 41.222 µs 41.320 µs]
        open_and_ord_to_term_suffix  time:   [81.646 µs 81.663 µs 81.679 µs]
        ord_to_term                  time:   [92.304 µs 92.331 µs 92.360 µs]
        open_and_ord_to_term         time:   [99.245 µs 99.653 µs 100.41 µs]

[fulmicoton]

Can you try an fst table? (It should faster... build times should be impacted however.)

[trinity-1686a]

superseded by #2268