[Backport 1.66.x] increased timeout for armv7 artifact build to 2 hou…

…rs (#37807) (#37809)

Building armv7 artifacts after adding Python 3.13 is failing with a
timeout. Hence increasing timeout to 2 hours.

tools/run_tests/artifacts/artifact_targets.py

@@ -160,7 +160,7 @@ def build_jobspec(self, inner_jobs=None):
                 ),
                 "tools/run_tests/artifacts/build_artifact_python.sh",
                 environ=environ,
-                timeout_seconds=60 * 60,
+                timeout_seconds=60 * 60 * 2,
             )
         elif "manylinux" in self.platform:
             if self.arch == "x86":