feat(iam-github-oidc-role): Add condition for allowlisting CIDR.

[alecsiemerink]

Description

This allows you to pass a list of CIDRs from where the role can be used.
A non-required variable is introduced, that when it is set it will add a condition to the aws_iam_policy_document with the CIDR.

Motivation and Context

#422
This enables more secure use of OIDC by allowing only a specified CIDR to use it. For example, for using self-hosted GitHub Actions runners and allowlisting them.

Breaking Changes

Not that I know of.

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

• I have executed pre-commit run -a on my pull request

[github-actions]

This PR has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this PR will be closed in 10 days

[alecsiemerink]

No activity here?

[github-actions]

This PR has been automatically marked as stale because it has been open 30 days
with no activity. Remove stale label or comment or this PR will be closed in 10 days

[github-actions]

This PR was automatically closed because of stale in 10 days

[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.