Add Azure Red Hat OpenShift content into decision tree

[pichuang]

• Fixed incorrect link for Spring Apps
• Add Azure Red Hat OpenShift content into Azure compute decision tree

[Jak-MS]

@EdPrice-MSFT

Can you review this PR?

IMPORTANT: When this content is ready to merge, you must add #sign-off in a comment or the approval may get overlooked.

#label:"aq-pr-triaged" @MicrosoftDocs/public-repo-pr-review-team

[Ed-Price]

@ckittel @josevarela

Can we get an engineering review on these updates?

[ckittel]

I've requested that the ARO content dev from @rayoef's team, @johnmarco review this. He manages the ARO content set and this is squarely inline with his CSA. Thank you @johnmarco.

[ckittel]

#sign-off

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Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @