Support Network Intent as Pre and Post Remediation Checks

Pre and post checks for remediation actions currently support only command-based or template-based validation, with no option to include Network Intent as a check type. This enhancement would allow Network Intent to be configured as a pre and post check, so the intent logic can validate network state before remediation and confirm resolution after remediation completes. Running the intent as part of these checks would also ensure that dashboards and runbooks reflect updated and accurate results following remediation, giving customers greater confidence that automated actions produced the intended outcome.