deps: bump dvc-data to 0.29.0

[efiop]

Should also help with #8359 , as we've sped up meta serialization which is used when writing directories to dvcfiles.

[codecov]

Codecov Report

Base: 93.48% // Head: 93.55% // Increases project coverage by +0.06% 🎉

Coverage data is based on head (c5fa891) compared to base (bccbbc1).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8791      +/-   ##
==========================================
+ Coverage   93.48%   93.55%   +0.06%     
==========================================
  Files         457      457              
  Lines       36253    36253              
  Branches     5166     5261      +95     
==========================================
+ Hits        33891    33915      +24     
+ Misses       1853     1833      -20     
+ Partials      509      505       -4     

Impacted Files	Coverage Δ
tests/unit/repo/experiments/conftest.py	90.62% <0.00%> (-4.69%)	⬇️
tests/unit/test_analytics.py	100.00% <0.00%> (+2.85%)	⬆️
dvc/analytics.py	95.52% <0.00%> (+4.47%)	⬆️
tests/conftest.py	83.33% <0.00%> (+6.81%)	⬆️
dvc/testing/fixtures.py	97.47% <0.00%> (+8.40%)	⬆️
tests/remotes/git_server.py	42.42% <0.00%> (+9.09%)	⬆️

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