update aws param store store to use getKey #4266

Job	Run time
Build (ubuntu-latest, linux)	1m 57s
Build (windows-latest, windows)	6m 46s
Build (macos-latest, macos)	1m 29s
Docker Lint	19s
[lint] demo-context	10s
[k3s] demo-helmfile	1m 3s
[lint] quick-start-advanced	11s
[localstack] demo-localstack	2m 24s
Acceptance Tests (ubuntu-latest, linux)	3m 24s
[validate] demo-context	3s
[mock-linux] examples/demo-atlantis	7s
Acceptance Tests (windows-latest, windows)	9m 11s
[validate] demo-localstack	5s
[mock-linux] examples/demo-component-versions	15s
Acceptance Tests (macos-latest, macos)	3m 59s
[validate] demo-stacks	4s
[mock-linux] examples/demo-context	12s
[validate] demo-helmfile	6s
[mock-linux] examples/demo-vendoring	30s
[validate] quick-start-advanced	4s
[mock-linux] tests/fixtures/scenarios/complete	18s
[validate] quick-start-simple	4s
[mock-windows] examples/demo-atlantis	19s
[mock-windows] examples/demo-component-versions	44s
[mock-windows] examples/demo-context	28s
[mock-windows] examples/demo-vendoring	59s
[mock-windows] tests/fixtures/scenarios/complete	1m 6s
[mock-macos] examples/demo-atlantis	14s
[mock-macos] examples/demo-component-versions	22s
[mock-macos] examples/demo-context	15s
[mock-macos] examples/demo-vendoring	32s
[mock-macos] tests/fixtures/scenarios/complete	30s
release	0s
	38m 10s

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