Cherry pick readme updates (#6912)

* Cherry-pick fixes (#6894)

* Add support for .NET 9.0 (#6887)

* Add NET9 and remove NET6 target frameworks

* Configure NETAnalyzers version in Directory.Build.props

* Update yamls to support NET 9.0

* Update tests to pass on Mac build.

* [#6889] CQA to support TokenCredential instead of key (#6892)

* Add support for MSI to access CQA service

* Use IsNullOrWhiteSpace instead of IsNullOrEmpty

* Catch exception in GetTokenAsync call

* Fix MemoryStream Converter when serializing (#6888)

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Co-authored-by: Cecilia Avila <44245136+ceciliaavila@users.noreply.github.com>
Co-authored-by: Joel Mut <62260472+sw-joelmut@users.noreply.github.com>

* Update README.md - fix the nuget badges (#6897)

* Updated README archival notice (#6911)

* Updated README archival notice

* README update

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Co-authored-by: Tracy Boehrer <trboehre@microsoft.com>

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Co-authored-by: Cecilia Avila <44245136+ceciliaavila@users.noreply.github.com>
Co-authored-by: Joel Mut <62260472+sw-joelmut@users.noreply.github.com>
Co-authored-by: Meir Blachman <meirblachman@gmail.com>
Co-authored-by: Tracy Boehrer <trboehre@microsoft.com>

Author: 5 people