SNOW-3727513: Remove stale libffi <=3.4.4 cap from conda recipe

[sfc-gh-helmeleegy]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-3727513

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.
   • I acknowledge that I have ensured my changes to be thread-safe. Follow the link for more information: Thread-safe Developer Guidelines
   • If adding any arguments to public Snowpark APIs or creating new public Snowpark APIs, I acknowledge that I have ensured my changes include AST support. Follow the link for more information: AST Support Guidelines

3. Please describe how your code solves the related issue.

   Remove stale libffi <=3.4.4 cap from conda recipe.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.28%. Comparing base (89e9fcf) to head (520ea17).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4277      +/-   ##
==========================================
+ Coverage   94.84%   95.28%   +0.44%     
==========================================
  Files         171      171              
  Lines       44368    44368              
  Branches     7579     7579              
==========================================
+ Hits        42080    42276     +196     
+ Misses       1480     1288     -192     
+ Partials      808      804       -4     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.