Add LICENSE and test data to sdist

[luizirber]

Discussion: #2489

Fix #2504

[codecov]

Codecov Report

Merging #2490 (e0e22dd) into latest (e9a7f1f) will increase coverage by 7.76%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           latest    #2490      +/-   ##
==========================================
+ Coverage   84.81%   92.58%   +7.76%     
==========================================
  Files         133      104      -29     
  Lines       14819    12025    -2794     
  Branches     2513     2513              
==========================================
- Hits        12569    11133    -1436     
+ Misses       1948      590    -1358     
  Partials      302      302              

Flag	Coverage Δ
python	92.58% <ø> (ø)
rust	?

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Impacted Files	Coverage Δ
src/core/src/index/linear.rs
src/core/src/errors.rs
src/core/src/index/search.rs
src/core/src/index/sbt/mod.rs
src/core/src/lib.rs
src/core/src/index/mod.rs
src/core/src/cmd.rs
src/core/src/ffi/storage.rs
src/core/src/sketch/nodegraph.rs
src/core/tests/minhash.rs
... and 19 more

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