Update pyproject.toml to correctly specify the data filepaths

[gsheni]

• The install test workflow packages evalml (creates whl/tar.gz file), install that whl/tar.gz, and tries to import the datasets (to make sure it is distributed with evalml).
• The commands in meta.yaml also try to import the datasets (to make sure conda has the files).

[codecov]

Codecov Report

Merging #3967 (6095d35) into main (c848b80) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##            main   #3967   +/-   ##
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  Coverage   99.7%   99.7%           
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  Files        347     347           
  Lines      36790   36790           
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  Hits       36670   36670           
  Misses       120     120           

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[jeremyliweishih]

LGTM!