Add Etcd Quickstart

[bpschmitt]

Summary

Adding Etcd Quickstart

Pre merge checklist

• [X] Did you check you NRQL syntax? - Does it work?
• [X] Did you check your dashboard image quality? - Do they look good?
• [X] Did you include an InstallPlan and Documentation reference?
• [X] Did you check your descriptive content for voice, tone, spelling and grammar errors?
• [X] Did you attach images of your dashboards to the PR so we can see them working?

Screenshots

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- etcd

[aswanson-nr]

Hey @bpschmitt! This is completely good to go, I just made some small QOL comments. If you'd prefer not to make any of those changes, let me know and I'll get this merged!

[bpschmitt]

@aswanson-nr ready to be merged.