chore: fix permissions and add env vars #187

Job	Run time
pr-ci-codegen / code-generation (AwsEncryptionSDK, 6.0.x, ubuntu-latest)	1m 40s
pr-ci-verification / verification (AwsEncryptionSDK, macos-12)	12m 13s
pr-test-vectors / decrypt_python_vectors (windows-latest)	6m 29s
pr-ci-net / testDotNet (windows-latest)	5m 28s
pr-test-vectors / generate_vectors (ubuntu-latest)	2m 49s
pr-test-vectors / decrypt_python_vectors (ubuntu-latest)	5m 9s
pr-ci-net / testDotNet (ubuntu-latest)	3m 0s
pr-test-vectors / generate_vectors (macos-12)	4m 42s
pr-test-vectors / decrypt_python_vectors (macos-12)	8m 52s
pr-ci-net / testDotNet (macos-12)	5m 11s
pr-test-vectors / decrypt_net_vectors_with_js (ubuntu-latest)	39s
pr-test-vectors / decrypt_net_vectors_with_js (macos-12)	1m 18s
	57m 30s

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