[v1.x] Update for MXNet 1.8.0 website release

[waytrue17]

Description

Port website changes from v1.8.x to v1.x #19988

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented

Changes

• Feature1, tests, (and when applicable, API doc)
• Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

[mxnet-bot]

Hey @waytrue17 , Thanks for submitting the PR
All tests are already queued to run once. If tests fail, you can trigger one or more tests again with the following commands:

• To trigger all jobs: @mxnet-bot run ci [all]
• To trigger specific jobs: @mxnet-bot run ci [job1, job2]

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CI supported jobs: [unix-cpu, centos-cpu, edge, miscellaneous, sanity, windows-gpu, unix-gpu, centos-gpu, website, clang, windows-cpu]

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Note:
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[samskalicky]

@waytrue17 does this include #20167 or any other PRs for the website that we made too?

[waytrue17]

@waytrue17 does this include #20167 or any other PRs for the website that we made too?

The #20167 PR is ported to v1.x by #20189. I think all website related changes are ported to v1.x