Update Data Class + System Tiers from BIA Results

Tech Stack Update

Please do not merge this MR before the Business Systems Analysts have reviewed and approved.

This MR updates the data classification and critical system tier values to align with the work performed as part of the FY22 Business Impact Analysis. This MR is currently in draft form, pending final review of data classification and critical system tier assignments.

Please take into account:

• If changing provisioners: You must also open an Update Tech Stack provisioner issue so all templates and Tech Stack information can be updated.
• If completing a system offboarding:
  • Open an issue for Tech Stack offboarding

Security Risk (@sttruong)

Not required prior to merging

• Once updates are finalized, reconcile changes with the ZenGRC System of Record

/cc @kxkue @gitlab-com/gl-security/security-assurance/security-risk-team