update llvm/svf version

[yuleisui]

No description provided.

[Copilot]

Pull request overview

This PR updates the LLVM dependency from version 16.0.0 to 18.1.0 and increments the SVF project version from 3.2 to 3.3.

• Updates LLVM version reference in the setup script to use LLVM 18.1.0
• Bumps SVF project version to 3.3 in the CMake configuration

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
setup.sh	Updates the default LLVM directory path to use LLVM 18.1.0 instead of 16.0.0
CMakeLists.txt	Increments the SVF project version from 3.2 to 3.3

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.15%. Comparing base (6d94f81) to head (69876ae).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1782   +/-   ##
=======================================
  Coverage   64.15%   64.15%           
=======================================
  Files         243      243           
  Lines       24569    24569           
  Branches     4627     4627           
=======================================
  Hits        15762    15762           
  Misses       8807     8807           

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