Int based linear interpol (#1482)

* Rename BlockwiseLinear to BlockwiseLinearLegacy

Reimplements the blockwise multilinear codec using integer arithmetics.
Added comments

* add estimate for blockwise

* Added one unit test

* use int based for linear interpol

* fix merge conflicts

* reuse code

* cargo fmt

* fix clippy

* fix test

* fix off by one

fix off by one to accurately interpolate autoincrement fields

* extend test, fix estimate

* remove legacy codec

Co-authored-by: Pascal Seitz <[email protected]>