feat(resource): New lacework_report_rule

[dmurray-lacework]

Issue: https://lacework.atlassian.net/browse/ALLY-756

Description:
Add new Terraform resource for report rules

Usage:

resource "lacework_report_rule" "example" {
  name            = var.name
  description     = var.description
  enabled         = true
  severities      = var.severities
  resource_groups = var.resource_groups
  email_alert_channels = var.channels

  aws_compliance_reports {
    pci    = true
    cis_s3 = true
  }

  weekly_snapshot = var.snapshot
}

[afiune]