Add doc for MSAL-based Azure CLI

[jiasli]

Add doc for MSAL-based Azure CLI.

Azure CLI PR:

• [Core] ADAL to MSAL migration Azure/azure-cli#19853

[jiasli]

It seems I can't add multiple authors, otherwise the CI warns about it:

• Line 4, Column 9: [Warning: author-not-found - See documentation] Invalid value for author: 'dbradish-microsoft, jiasli' is not a valid GitHub ID.
• Line 5, Column 12: [Suggestion: ms-author-invalid - See documentation] Invalid value for 'ms.author', 'dbradish, jiasli' is not a valid Microsoft alias.

[jiasli]

@dBradish, should I put in your name or mine?

[dbradish-microsoft]

@jiasli , use yours that way you get the GitHub Issues. :-)

[chasewilson]

I'm up for discussion on any of my suggested changes and other than those, this looks good to me.

[chasewilson]

Will we be adding the release notes for 2.30.0 in another PR at time of release?

[jiasli]

Yes.

[dbradish-microsoft]

@jiasli , @chasewilson , @yonzhan why do we need both the Migrate article and this new article? I feel they should be combined as they are the same subject matter. Your thoughts?

[chasewilson]

@jiasli , @chasewilson , @yonzhan why do we need both the Migrate article and this new article? I feel they should be combined as they are the same subject matter. Your thoughts?

It does appear to be duplicate information and I'm good with removing it if no one has any objections.

[jiasli]

We no longer uses Azure Identity, so I think https://docs.microsoft.com/en-us/cli/azure/migrate-to-azure-identity can be merged into the MSAL-based Azure CLI article.

[opbld31]

Docs Build status updates of commit 4ea79f7:

✅ Validation status: passed

File	Status	Preview URL	Details
docs-ref-conceptual/TOC.yml	✅Succeeded	View
docs-ref-conceptual/install-azure-cli-beta.md	✅Succeeded
docs-ref-conceptual/install-azure-cli-windows.md	✅Succeeded	View
docs-ref-conceptual/install-azure-cli.md	✅Succeeded	View
docs-ref-conceptual/migrate-to-azure-identity.md	✅Succeeded
docs-ref-conceptual/msal-based-azure-cli.md	✅Succeeded	View
docs-ref-conceptual/release-notes-azure-cli.md	✅Succeeded	View

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