chore: fail samples nox session if python version is missing (#1546)

diff --git a/samples/compute/noxfile.py b/samples/compute/noxfile.py
index b008613..1fd8956 100644
--- a/samples/compute/noxfile.py
+++ b/samples/compute/noxfile.py
@@ -98,6 +98,10 @@
     "True",
     "true",
 )
+
+# Error if a python version is missing
+nox.options.error_on_missing_interpreters = True
+
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