fix: Change `instance_iam_role_use_name_prefix` to use correct data type

[jtzero]

Description

changes data type of variable "instance_iam_role_use_name_prefix" to bool

Motivation and Context

Is to align the correct data type, the result in putting in a string

Error: Incorrect condition type
│
│   on .terraform/modules/pull.batch/main.tf line 88, in resource "aws_iam_role" "instance":
│   88:   name        = var.instance_iam_role_use_name_prefix ? null : var.instance_iam_role_name
│     ├────────────────
│     │ var.instance_iam_role_use_name_prefix is "runner"
│
│ The condition expression must be of type bool.

Breaking Changes

No

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 use this module in my workflow and just tested it locally
• [x] I have executed pre-commit run -a on my pull request

  Terraform fmt............................................................Passed
  Terraform validate.......................................................Passed
  Terraform docs...........................................................Passed
  Terraform validate with tflint...........................................Passed
  check for merge conflicts................................................Passed
  fix end of files.........................................................Passed

[antonbabenko]

This PR is included in version 2.0.1 :tada:

[github-actions[bot]]

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