second Entra Rebrand attempt

[DidunAyodeji]

Updating all Azure AD terms to the Microsoft Entra ID terms in all md files.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Documentation content changes
[ ] Other... Please describe:

What to Check

The updated changes to Microsoft Entra ID terminology make sense.

Other Information

Here's a link to the Rebrand guidelines. Note that the script doesn't have all the entries in the glossary that mine has. Let me know if you'd like to see my version of the script. https://review.learn.microsoft.com/en-us/entra/fundamentals/how-to-rename-azure-ad?branch=main