Update Set-ADServiceAccount.md

[HerbertMauerer]

PR Summary

remove LDS and snapshot references
samAccountName rules updated
-Path rules updated

PR Checklist

• Descriptive Title: Updating various details, Path, samAccountName and LDS snapshot use
• Summary: There are several improvements in GMSA documentation, behavior changes and learnings in support. Some need updates in this documentation.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[learn-build-service-prod]

Learn Build status updates of commit 924c9e6:

✅ Validation status: passed

File	Status	Preview URL	Details
docset/winserver2022-ps/activedirectory/Set-ADServiceAccount.md	✅Succeeded	View (WindowsServer2022-ps)

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