List apps with GET /api/v1/users/{userId}/appLinks endpoint only

[monde]

Currently, the GET /api/v1/apps to list apps requires administrator permissions. okta-aws-cli will fall back to the GET /api/v1/users/{userId}/appLinks endpoint if it can't access GET /api/v1/apps. Therefore, the cli should only access GET /api/v1/users/{userId}/appLinks to improve the user experience.