Skip test_sendfile_close_peer_in_the_middle_of_receiving on ppc64le

Reported upstream https://github.com/python/cpython/issues/123384
Which was a duplicate of https://github.com/python/cpython/issues/120226

The test is fixed on the main branch, but skipping is easier than backporting.

The failure occurs with Kernel 6.10.x even when Python is built with an older Kernel.
By skipping the tests, we can ship a CVE fix.

python3.12.spec

@@ -1174,6 +1174,8 @@ CheckPython() {
   # the test is skipped until it is fixed in upstream.
   # see: https://github.com/python/cpython/issues/104280#issuecomment-1669249980
   # test_gdb is skipped due to https://bugzilla.redhat.com/2275274#c11
+  # test_sendfile_close_peer_in_the_middle_of_receiving:
+  #  https://github.com/python/cpython/issues/120226
 
   LD_LIBRARY_PATH=$ConfDir $ConfDir/python -m test.regrtest \
     -wW --slowest %{_smp_mflags} --timeout=2700 \
@@ -1183,6 +1185,9 @@ CheckPython() {
     %ifarch %{mips64}
     -x test_ctypes \
     %endif
+    %ifarch ppc64le
+    -i test_sendfile_close_peer_in_the_middle_of_receiving \
+    %endif
 
   echo FINISHED: CHECKING OF PYTHON FOR CONFIGURATION: $ConfName