Fix ssm parameters everywhere #13

Job	Run time
test-changeset-formatting	1m 39s
test-drift-detection	53s
test-long-running	2m 48s
test-create-only-then-execute	37s
test-markdown-output	37s
test-empty-changeset	42s
test-boolean-inputs (boolean-true, true, false, true)	39s
test-boolean-inputs (boolean-false, false, true, false)	40s
test-boolean-inputs (string-true, true, false, 1)	36s
test-event-streaming	57s
test-large-template	7s
test-validation-error	18s
test-create-and-execute	1m 13s
test-execution-error	2m 22s
test-enhanced-validation-errors	9s
test-stack-id-retrieval	41s
test-execute-only-with-events	18s
cleanup	1m 18s
	16m 34s

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