Use private network interfaces as default for ring and frontend

[chaudum]

Proof of concept for using private network interfaces as default for ring configurations.

What this PR does / why we need it:

At the moment, the default network interfaces for the ring configurations are eth0 and en0, which works for probably everyone running Loki inside Docker.
However, if you run the Loki binary directly (which is a valid first use-case for Loki), it is very likely that Loki won't start because the primary network interface has a different name.

• Loki SSD fails if interface is not eth0 or en0 #4948

Checklist

• Documentation added
• Tests updated
• Add an entry in the CHANGELOG.md about the changes.

[DylanGuedes]

Although I consider this a better default, I think it is considered a breaking change. That said, WDYT of documenting this in the upgrading guide?

[DylanGuedes]

hmm here you're changing vendor code 🤔

[chaudum]

Sorry, I wanted to open it as a draft PR. The corresponding upstream PR in dskit is grafana/dskit#100
It would also need to be used in Cortex.

[DylanGuedes]

oops, my bad.

[stale]

Hi! This issue has been automatically marked as stale because it has not had any
activity in the past 30 days.

We use a stalebot among other tools to help manage the state of issues in this project.
A stalebot can be very useful in closing issues in a number of cases; the most common
is closing issues or PRs where the original reporter has not responded.

Stalebots are also emotionless and cruel and can close issues which are still very relevant.

If this issue is important to you, please add a comment to keep it open. More importantly, please add a thumbs-up to the original issue entry.

We regularly sort for closed issues which have a stale label sorted by thumbs up.

We may also:

• Mark issues as revivable if we think it's a valid issue but isn't something we are likely
  to prioritize in the future (the issue will still remain closed).
• Add a keepalive label to silence the stalebot if the issue is very common/popular/important.

We are doing our best to respond, organize, and prioritize all issues but it can be a challenging task,
our sincere apologies if you find yourself at the mercy of the stalebot.

[kavirajk]

Closing this as no activities for long time. Feel free to send new PR if anyone want's to revive the work