This PR updates SSO documentation to address inconsistencies, per tech support's jira ticket. I've made some additional changes as well:

• I've removed 4/5ish call outs throughout the doc. Callouts lose effectiveness if you use them often.
• Created visual distinction in the ToC with strategic h2s and h3s.
• I've condensed certain redundant UI steps like "Save", "Finish", "Select X" and created more compound steps. This shortens the procedures and simplifies the ~weight of each substep.
• I've updated Entra procedures where they've fallen out of sync

Work that needs to be done:

• I've added some additional context to the Testing section, but it needs to be reworked generally.
• I need to verify Azure Connect steps, including adding some context for steps that seem self-evident but could introduce uncertainty.
• Idk what happened with the one callout but I need to fix it lol.
• I want to add more context to some of the Azure Connect steps.
• The ticket has some stuff for UI consistency across third party providers and our docs. Need to look for those mismatches more deeply.

While I personally don't prefer titles with "Step 1: jfdsfjsdf", I'm more than happy to defer if we think it'll help users understand the sequence as linear!! :) lmk