Revert "src/sage/interfaces/gap_workspace.py: Use hash of GAP_SO to disambiguate the workspace file, not SAGE_LOCAL"

This reverts commit a801e6d.

See #33446.

Author: tornaria

src/sage/interfaces/gap_workspace.py

@@ -16,7 +16,7 @@
 import os
 import time
 import hashlib
-from sage.env import DOT_SAGE, GAP_SO
+from sage.env import DOT_SAGE, SAGE_LOCAL
 
 
 def gap_workspace_file(system="gap", name="workspace", dir=None):
@@ -59,10 +59,7 @@ def gap_workspace_file(system="gap", name="workspace", dir=None):
     if dir is None:
         dir = os.path.join(DOT_SAGE, 'gap')
 
-    if GAP_SO:
-        h = hashlib.sha1(GAP_SO.encode('utf-8')).hexdigest()
-    else:
-        h = 'unknown'
+    h = hashlib.sha1(SAGE_LOCAL.encode('utf-8')).hexdigest()
     return os.path.join(dir, '%s-%s-%s' % (system, name, h))