feat: Add a way to define IAM policy name prefix

[alisson276]

Description

Allow to give to the policy a name other than the var.role_name

Motivation and Context

Sometimes we want to import things already created by the AWS Console, and the default policy name is AWSLambdaBasicExecutionRole-<random_uuid>. So in order to be able to import without recreating the policy this change allow to set a new policy name. The default behavior if var.policy_name is not set is to use role_name exactly how this was doing before this change.

Breaking Changes

I don't think so

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

[antonbabenko]

This PR is included in version 4.4.0 🎉

[monospacesoftware]

We're experiencing an error with version 4.4.0, appears to be caused by this change:

Error: Error in function call

 on .terraform/modules/lambda_package/iam.tf line 15, in locals:
 15:   policy_name = coalesce(var.policy_name, local.role_name)
   ├────────────────
   │ while calling coalesce(vals...)
   │ local.role_name is null
   │ var.policy_name is null

Call to function "coalesce" failed: no non-null, non-empty-string
arguments.

[antonbabenko]

2 mins, I will correct it.

[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.