fix(e2e): update flit_core to 3.10.1 for Python 3.14 compatibility

flit_core 3.9.0 uses ast.Str which was removed in Python 3.14,
causing multiple e2e tests to fail. Update to 3.10.1 which supports
all Python versions 3.11-3.14.

Co-Authored-By: Claude <claude@anthropic.com>

Signed-off-by: Ioannis Angelakopoulos <iangelak@redhat.com>

Author: iangelak

e2e/download_sequence/simplejson-build-order.json

@@ -3,7 +3,7 @@
     "type": "build-system",
     "req": "flit_core<4,>=3.8",
     "dist": "flit-core",
-    "version": "3.9.0",
+    "version": "3.10.1",
     "why": [
       [
         "toplevel",
@@ -23,11 +23,11 @@
       [
         "build-system",
         "flit_core<4,>=3.8",
-        "3.9.0"
+        "3.10.1"
       ]
     ],
     "prebuilt": false,
-    "source_url": "https://files.pythonhosted.org/packages/c4/e6/c1ac50fe3eebb38a155155711e6e864e254ce4b6e17fe2429b4c4d5b9e80/flit_core-3.9.0.tar.gz#sha256=72ad266176c4a3fcfab5f2930d76896059851240570ce9a98733b658cb786eba",
+    "source_url": "https://files.pythonhosted.org/packages/d5/ae/09427bea9227a33ec834ed5461432752fd5d02b14f93dd68406c91684622/flit_core-3.10.1.tar.gz#sha256=66e5b87874a0d6e39691f0e22f09306736b633548670ad3c09ec9db03c5662f7",
     "source_url_type": "sdist"
   },
   {

e2e/test_download_sequence.sh

@@ -21,7 +21,7 @@ pass=true
 
 # Check for output files
 EXPECTED_FILES="
-sdists-repo/downloads/flit_core-3.9.0.tar.gz
+sdists-repo/downloads/flit_core-3.10.1.tar.gz
 sdists-repo/downloads/setuptools-70.0.0.tar.gz
 sdists-repo/downloads/simplejson-3.19.2.tar.gz
 sdists-repo/downloads/wheel-0.43.0.tar.gz

e2e/test_override.sh

@@ -23,7 +23,7 @@ fromager \
   --wheels-repo="$OUTDIR/wheels-repo" \
   --work-dir="$OUTDIR/work-dir" \
   --patches-dir "$SCRIPTDIR/flit_core_patches" \
-  bootstrap 'flit_core==3.9.0'
+  bootstrap 'flit_core==3.10.1'
 
 find "$OUTDIR/wheels-repo/simple/" -name '*.whl'
 
@@ -50,9 +50,9 @@ fi
 
 # Check for output files
 EXPECTED_FILES="
-wheels-repo/downloads/flit_core-3.9.0-0-py3-none-any.whl
+wheels-repo/downloads/flit_core-3.10.1-0-py3-none-any.whl
 
-sdists-repo/downloads/flit_core-3.9.0.tar.gz
+sdists-repo/downloads/flit_core-3.10.1.tar.gz
 "
 
 for f in $EXPECTED_FILES; do

e2e/test_prebuilt_wheels_alt_server.sh

@@ -12,7 +12,7 @@ mkdir -p "$INIT"
 
 # What are we building?
 DIST="flit_core"
-VERSION="3.9.0"
+VERSION="3.10.1"
 
 # Get the wheel we need from PyPI
 fromager \
@@ -57,7 +57,7 @@ fromager \
 
 # Ensure we have both expected wheels
 EXPECTED_FILES="
-wheels-repo/prebuilt/flit_core-3.9.0-0-py3-none-any.whl
+wheels-repo/prebuilt/flit_core-3.10.1-0-py3-none-any.whl
 wheels-repo/downloads/wheel-0.43.0-0-py3-none-any.whl
 "