Tech doc: Sysdig training

[mtspn]

Describe the issue Create a tech doc to describe how to access Sysdig self-serve training

Additional context This ticket is in response to #4765

How does this benefit the users of our platform? Promotoes more training options, offers self-serve training

Definition of done

• [x] create an additional tech document in the app monitoring section that links to this on-demand training
• [x] review of document with Pilar
• [x] create a rocketchat channel to support people working through this training at their own pace
• [x] promote this training during community meetups
• [x] add new link to this doc from training tech doc