fix: always resolve --python argument (#2328) (#2331)

fix: always resolve --python argument (#2328)

fix: always resolve the --python argument

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Author: henryiii

Diff for: cibuildwheel/util.py

@@ -705,6 +705,10 @@ def virtualenv(
     dependency_constraint_flags are ignored since nothing is installed in the
     venv. Otherwise, pip is installed, and setuptools + wheel if Python < 3.12.
     """
+
+    # virtualenv may fail if this is a symlink.
+    python = python.resolve()
+
     assert python.exists()
 
     if use_uv: