Add tip that suggests 'aws login' during 'aws configure' for new profiles

[ashovlin]

Issue #, if available: CLI-8031

Description of changes:
* When running aws configure for new profiles, suggests aws login instead which does not require the usage of long-term IAM access keys.
* Also backfills some examples for aws login

➜ aws configure --profile my-new-profile

Tip: You can now deliver temporary credentials to the AWS CLI using your AWS Console session. Simply run 'aws login'.

AWS Access Key ID [None]: 

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[kdaily]

A good improvement to the user experience to learn about this feature. Left some minor feedback on the wording.