Add version popout to "Packaged Distributions" table

[thesuperzapper]

This PR improves the "Packaged Distributions" table by making it clearer how old/new each Kubeflow Version is. Right now, it's very confusing to new users, as they might not know that Kubeflow 1.7 is actually very old (released in March 2023), so they might start the process of adopting a long-abandoned distribution.

The key changes this PR makes are:

1. In the "Packaged Distributions" table under the "Kubeflow Version" column:
   • Put a hover-able icon that says how long ago that version of Kubeflow was released. (Note, this is the Kubeflow released date, not the release date of the distribution).
   • Highlight distributions which are up to date (within 1 minor version of the latest), and de-emphasize distributions which are 2+ minor versions out of date.
   • Place warning icons beside versions which are very old (2 = warning, 3+ = scull)
2. Remove the very old link to the historical "conformance program" which was started by google but never continued.

Please note, all of the styling is automatic:

• when the short-codes for that distribution's version are updated everything will change automatically
• when we release a new version of Kubeflow, can use the content/en/docs/started/installing-kubeflow/get_new_releases.sh to cache that version's release date into the content/en/docs/started/installing-kubeflow/release-info folder of JSON (the build will fail to remind you if you try referencing a version which it does not know about)

Screenshots

OLD

NEW

Table Overview

On-Hover ("Latest Version")

On-Hover ("1 from Latest Version")

On-Hover ("2 from Latest Version")

On-Hover ("3+ from Latest Version")

[google-oss-prow]

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[thesuperzapper]

@jbottum @andreyvelich @kimwnasptd @terrytangyuan @ederign please take a look at this important style update to the "Packaged Distributions" table.

It should help avoid confusion with new users about which distributions are currently supported.
See the preview site here:

• https://deploy-preview-3842--competent-brattain-de2d6d.netlify.app/docs/started/installing-kubeflow/#kubeflow-platform

[juliusvonkohout]

The screenshots look good to me.

[jbottum]

Since this impacts how distributions are promoted, my suggestion is that it would be good if a majority of the distribution owners approved this i.e. we need 6 distributions to provide a +1 or lgtm

[terrytangyuan]

/cc @kubeflow/kubeflow-steering-committee
/hold

[google-oss-prow]

@terrytangyuan: GitHub didn't allow me to request PR reviews from the following users: kubeflow/kubeflow-steering-committee.

Note that only kubeflow members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

/cc @kubeflow/kubeflow-steering-committee
/hold

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