feat(module/asg): Introduce Instance Refresh for ASG module

[sebastianczech]

Description

PR introduces new feature for ASG module - instance refresh, which can be customized by allowing to change every possible attribute for instance refresh block.

Motivation and Context

#416

How Has This Been Tested?

Code was tested by extending example isolated_design_autoscale and deploying it in the lab.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.

[sebastianczech]

/help

ChatOPS built in help:

Currently supported commands include:

• /sca - run all SCA tests via pre-commit
• /validate - run terraform validate
• /plan - plan the infrastructure (only examples)
• /apply - deploy the infrastructure and destroy afterwards (only examples)
• /idempotence - test idempotence: deploy, plan and destroy afterwards (only examples).

The 1^st command does not take arguments, the remaining take two:

• paths - a space delimitied list of module paths
• tf_version - (optional, defaults to the latest available) a space delimited list of Terraform versions to test the infrastrucure against.

Examples:

# run idempotence tests on listed modules with Terraform versions: 1.2 (latest patch available), 1.4 (latest patch available), 1.5.4.
/idempotence paths="examples/combined_design examples/panorama_standalone" tf_version="1.2 1.4 1.5.4"

# run validation tests with the latest available Terraform version on listed modules.
/validate paths="modules/vmseries modules/vpc examples/combined_design"

[sebastianczech]

/idempotence paths="examples/centralized_design_autoscale examples/combined_design_autoscale examples/isolated_design_autoscale"

Testing job ID: 7253921886
Job result: SUCCESS

[sebastianczech]

Changes are going to be deployed in new repository in PR PaloAltoNetworks/terraform-aws-swfw-modules#3