Create Google Workspace SAML and group sync demo video

To help address pain point "Customer specific instructions" (see #4890 (closed)), I've asked for a Google Workspace demo video on setting up SAML and group sync, similar to what we already have for Azure AD and Okta.

Note: The video does not need to be polished.

1. Set up a session to record the demo. You can use the new test environment or your own.
2. Upload the video to GitLab Unfiltered: https://youtu.be/NKs0FSQVfCY
3. Add link to the docs: https://docs.gitlab.com/ee/user/group/saml_sso/#google-workspace (MR)

Due date is a "soft" due date. Please push it out as needed. As it's tied to an OKR, should be done before 2023-04-31