Update actions/cache to v4

[eapolinario]

Tracking issue

NA

Why are the changes needed?

Similar to flyteorg/flyte#6256, we need to update all of our uses of the actions/cache gh action to v4.

What changes were proposed in this pull request?

How was this patch tested?

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

Docs link

[flyte-bot]

Code Review Agent Run Status

• Limitations and other issues: ❌ Failure - The AI Code Review Agent skipped reviewing this change because it is configured to exclude certain pull requests based on the source/target branch or the pull request status. You can change the settings here, or contact the agent instance creator at eduardo@union.ai.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.29%. Comparing base (66d4aed) to head (7f22339).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3139      +/-   ##
==========================================
+ Coverage   76.85%   77.29%   +0.43%     
==========================================
  Files         206      222      +16     
  Lines       21851    22894    +1043     
  Branches     2837     2837              
==========================================
+ Hits        16794    17695     +901     
- Misses       4269     4410     +141     
- Partials      788      789       +1     

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