Update training references to github login to included IDIR linking requirment

[mtspn]

Describe the issue

• Add details regarding requiring and IDIR to training slides and lab exercises

Additional context

• https://github.com/BCDevOps/devops-platform-workshops/blob/master/101-lab/content/00_overview.md
• https://github.com/BCDevOps/devops-platform-workshops/blob/master/101-lab/content/01_adding_team_members.md
• https://github.com/BCDevOps/devops-platform-workshops/blob/master/101-lab/content/01_setup.md

101 slides:

• Requesting New Users to GitHub, Rocket.Chat, etc

Definition of ready

• To start this ticket, details of the IDIR linking process are required from the DevEx team

Definition of done

• pages and slides detailed above are updated to reflect changes to require an IDIR linked to github account