chore: deprecate file_actions on state

[roeap]

Description

In one of @fvaleye's latest PRs (#3841), we got rid of the last call sites of file_actions on DeltaTableState. Since we generally discourage materialising Add actions and rather do processing/planning on the view into the underlying arrow data, it's high time we deprecate these methods and remove the last invocations within our tests.

This PR does just that.

[codecov]

Codecov Report

❌ Patch coverage is 72.09302% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.78%. Comparing base (a144752) to head (8dc9ef0).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/protocol/checkpoints.rs	0.00%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3863      +/-   ##
==========================================
- Coverage   73.83%   73.78%   -0.06%     
==========================================
  Files         151      151              
  Lines       39134    39127       -7     
  Branches    39134    39127       -7     
==========================================
- Hits        28895    28868      -27     
- Misses       8968     8989      +21     
+ Partials     1271     1270       -1     

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