Hackathon: add multifiltersearch to NDM devices page

[git-thuerk-done]

What does this PR do? What is the motivation?

Adds the multifiltersearch shortcode to the NDM Supported devices page to aid in searching for supported vendor profiles. Moves the top section to the bottom in a new Troubleshooting section as it felt awkward having that listed above the search table.
Moves the links to inline markdown format as that is what is supported for frontmatter links

Merge instructions

Merge readiness:

• Ready for merge

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Additional notes

[github-actions]

Preview links (active after the build_preview check completes)

Modified Files

• https://docs-staging.datadoghq.com/aliciathuerk/add-shortcode-NDM/network_monitoring/devices/supported_devices

[brett0000FF]

Looks good! Two comments that can wait for a follow up if you agree (these impacted the original):

• Some of the vendor names are not capitalized correctly. For example, Apc -> APC.
• I think it would be more useful if all of the Cisco items were split into their own rows. Otherwise, it's difficult to know which file applies to which entry.

[git-thuerk-done]

Looks good! Two comments that can wait for a follow up if you agree (these impacted the original):

• Some of the vendor names are not capitalized correctly. For example, Apc -> APC.
• I think it would be more useful if all of the Cisco items were split into their own rows. Otherwise, it's difficult to know which file applies to which entry.

those are great callouts! I think it's impt to fix the Cisco items so i'll do that with this PR