Exit after container creation script (#34945)

.devcontainer/scripts/container-creation.sh

@@ -9,3 +9,6 @@ git submodule update --init --recursive
 # Also run the full restore on the repo so that go-to definition
 # and other language features will be available in C# files
 ./restore.sh
+# The container creation script is executed in a new Bash instance
+# so we exit at the end to avoid the creation process lingering.
+exit