Add link to Operating System Compatibility table from Download page

[hdhalter]

Is your feature request related to a problem? Please describe.
This is a request to add a link to the Downloads page: "Operating system compatibility" - https://opensearch.org/docs/latest/install-and-configure/install-opensearch/index/#operating-system-compatibility

See opensearch-project/documentation-website#4218

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[hdhalter]

@nateynateynate - Tagging you since you are on the original issue. I've made the changes to the table on my side, now we need to make sure people have visibility to this table from the Download page.

[krisfreedain]

@nateynateynate @astephanus can you work on the template to propose a permanent place for this on the page?