iam-assumable-roles-with-saml: Allow for multiple provider ids

[ravanapel]

Description

The aws_iam_policy_document has support for specifying multiple principle federated identifiers like this:

"Principal": {
  "Federated": [
    "arn:aws:iam::012345678912:saml-provider/first",
    "arn:aws:iam::012345678912:saml-provider/second"
  ]
},

Currently, this module only supports specifying one provider_id:

principals {
  type        = "Federated"
  identifiers = [var.provider_id]
}

Motivation and Context

Solves issue #109

Breaking Changes

How Has This Been Tested?

Not yet tested

[antonbabenko]

Could you please also update the code in examples for this module?

[ravanapel]

Sure! Do you mean expanding the current example with a module that uses multiple provider ids?

[antonbabenko]

Yes, update the example to show how one and multiple provider ids can be used.

[ravanapel]

I've updated the example.

[antonbabenko]

v3.4.0 has been just released.

[github-actions]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.