* add aliasmetadata sdk helper and add to aws auth
* split into ec2_metadata and iam_metadata fields
* fix tests
* strip pointer
* add test of default metadata
* more test <3
* switch from interface to custom marshallers
* add tests for marshalling
* store nil when selected fields are default
* separate loop into pieces
* separate acc test into multiple
* Update builtin/credential/aws/path_login.go
Co-Authored-By: Jim Kalafut <jkalafut@hashicorp.com>
* changes from feedback
* update aws test
* refactor to also populate auth metadata
* update how jsonification is tested
* only add populated metadata values
* add auth_type to ec2 logins
Co-authored-by: Jim Kalafut <jkalafut@hashicorp.com>
