feat(index): segmented bitmap index consolidation on optimize

[zhangyue19921010]

closes: #7198

[codecov]

Codecov Report

❌ Patch coverage is 95.02165% with 23 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
rust/lance-index/src/scalar/bitmap.rs	65.51%	7 Missing and 3 partials ⚠️
rust/lance/src/index/scalar/bitmap.rs	81.39%	3 Missing and 5 partials ⚠️
rust/lance/src/index/append.rs	98.94%	0 Missing and 3 partials ⚠️
rust/lance-index/src/scalar.rs	90.00%	1 Missing ⚠️
rust/lance/src/index/create.rs	98.91%	0 Missing and 1 partial ⚠️

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