[WIP] Table changes scan builder

[OussamaSaoudi-db]

What changes are proposed in this pull request?

This introduces

This PR affects the following public APIs

ScanBuilder becomes parameterized by a Scannable. Existing code with scan_builder: ScanBuilder becomes scan_builder: ScanBuilder<Snapshot>.

How was this change tested?

[codecov]

Codecov Report

Attention: Patch coverage is 85.07463% with 20 lines in your changes missing coverage. Please review.

Please upload report for BASE (main@ccf5e9a). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
kernel/src/table_changes/mod.rs	84.21%	12 Missing and 6 partials ⚠️
ffi/src/lib.rs	0.00%	1 Missing ⚠️
kernel/src/log_segment/tests.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #513   +/-   ##
=======================================
  Coverage        ?   80.25%           
=======================================
  Files           ?       62           
  Lines           ?    13473           
  Branches        ?    13473           
=======================================
  Hits            ?    10813           
  Misses          ?     2107           
  Partials        ?      553           

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