Added ReadOnly capabilities to AWS

Signed-off-by: Dom Meddick <dom.meddick@engineerbetter.com>
Co-authored-by: William Young <will.young@engineerbetter.com>
Co-authored-by: Adrienne Galloway <adrienne.galloway@engineerbetter.com>

pkg/provider/aws/secretsmanager/secretsmanager.go

@@ -311,3 +311,7 @@ func (sm *SecretsManager) Validate() (esv1beta1.ValidationResult, error) {
 	}
 	return esv1beta1.ValidationResultReady, nil
 }
+
+func (sm *SecretsManager) Capabilities() esv1beta1.SecretStoreCapabilities {
+	return esv1beta1.SecretStoreReadOnly
+}