Update Azure Active Directoy, Azure AD, and AAD baseline references to Microsoft Entra ID equivalent

[ahuynhMITRE]

🗣 Description

Updated Azure Activie Directoy, Azure AD, AAD references in the markdown files including unique IDs and references in other baselines to match the renaming of the M365 product.

💭 Motivation and context

This change is required in order to be up to date with how Microsoft references their products. Microsoft renamed Azure Active Directory (Azure AD) to Microsoft Entra ID to communicate the multicloud, multiplatform functionality of the products, alleviate confusion with Windows Server Active Directory, and unify the Microsoft Entra product family.

Closes issue #888
linked to #921

🧪 Testing

check each instance of Azure Active Directoy, Azure AD, and AAD mentioned in the baselines are correctly replaced with their Microsoft Entra equivalent

✅ Pre-approval checklist

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✅ Pre-merge checklist

• PR passed smoke test check.

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✅ Post-merge checklist

• Feature branch deleted after merge to clean up repository.
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[ahuynhMITRE]

@buidav & @mitchelbaker-cisa for the unique IDs i originally changed MS.AAD to MS.ENTRAID but looking at Microsoft's documentation their prefered acronym replacement for AAD is ME-ID...

Link listed below.
https://learn.microsoft.com/en-us/entra/fundamentals/new-name

open to changing it to ENTRAID to match the markdown file name and also not sure if the "-" breaks our automation for pulling unique IDs.

[buidav]

@buidav & @mitchelbaker-cisa for the unique IDs i originally changed MS.AAD to MS.ENTRAID but looking at Microsoft's documentation their prefered acronym replacement for AAD is ME-ID...

Link listed below. https://learn.microsoft.com/en-us/entra/fundamentals/new-name

open to changing it to ENTRAID to match the markdown file name and also not sure if the "-" breaks our automation for pulling unique IDs.

We will have to think about the strategy and bumping major versions for i.e v1 to v2 for ScubaGear itself when changing the IDs now.
This is a breaking change that will interrupt current workflows for folks.

[mitchelbaker-cisa]

Looks good, although we'll need to investigate into the policy identifier changes further.

[buidav]

@ahuynhMITRE For when you get back. Would recommend reverting the Policy identifiers back to MS.AAD for this PR.
We'll have to make identifiers changes in a separate PR in the future.
Changing the policy identifiers now would be too disruptive of current workflows.

[buidav]

One additional change for the 3.4 instructions. It says Azure AD MFA but the documentation has switched to Entra ID and the title is now slightly different How to migrate MFA and SSPR policy settings to the Authentication methods policy for Microsoft Entra ID

#### MS.AAD.3.4v1 Instructions
1. Go through the process of [migrating from the legacy Azure AD MFA and Self-Service Password Reset (SSPR) administration pages to the new unified Authentication Methods policy page](https://learn.microsoft.com/en-us/entra/identity/authentication/how-to-authentication-methods-manage).

[mitchelbaker-cisa]

Looks good, two small suggestions.

[buidav]

2 final items to take care of.

Item 1:

The image for different types of MFA in policy group 3 no longer exists in the repo for some reason.
Here's a link to the image way back. Need to reupload it to this branch to the images folder to fix the image link. https://github.com/cisagov/ScubaGear/blob/v1.2.0/images/aad-mfa.png

Item 2:
There are 2 more instances of Azure AD to replace in the 2.1 note.

[buidav]

Looks good! Good work Andrew!

[ahuynhMITRE]

@nanda-katikaneni ready to merge