feat(storage): remove magic number MAX_COMPACT_LEVEL_COUNT

[Li0k]

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What's changed and what's your intention?

1. remove magic number MAX_COMPACT_LEVEL_COUNT
2. remove the overlapping file count limitation of MAX_COMPACT_LEVEL_COUNT. Because the number of SSTs in each overlapping level may exceed 1, it is inaccurate to use level count to limit

• related enhance: Remove various magic numbers of hummock and object_store  #16494

Checklist

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Release note

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[Little-Wallace]

LGTM