exclude golden tests+data when publishing package

[zachschuermann]

We exceeded 10MB limit on crates.io for package size. Exclude golden tests and golden data from publishing to stay under the limit.

new package size:

 Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.96s
    Packaged 112 files, 557.5KiB (120.8KiB compressed)

old package size (and error):

    Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.06s
    Packaged 203 files, 13.9MiB (13.0MiB compressed)
   Uploading delta_kernel v0.3.0 (/Users/zach.schuermann/dev/delta-kernel-rs/kernel)
error: failed to publish to registry at https://crates.io

Caused by:
  the remote server responded with an error (status 413 Payload Too Large): max upload size is: 10485760

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.51%. Comparing base (f8b0485) to head (2d86f5a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #307   +/-   ##
=======================================
  Coverage   72.51%   72.51%           
=======================================
  Files          43       43           
  Lines        7783     7783           
  Branches     7783     7783           
=======================================
  Hits         5644     5644           
  Misses       1768     1768           
  Partials      371      371           

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