Running EC2 Workloads at Scale - Update Interruption Handling section

[ivallhon]

Update the interruption handling section of the workshops "Running EC2 Workloads at scale with Auto Scaling groups " and "EC2 Auto Scaling with multiple instance types and purchase options" to use the new EC2 Spot Interruption Handler

• https://ec2spotworkshops.com/running-amazon-ec2-workloads-at-scale/spot_resilience.html
• https://ec2spotworkshops.com/ec2-auto-scaling-with-multiple-instance-types-and-purchase-options/spot_resilience.html

[ivallhon]

This is addressed on #134 . Resolving