fix: All lifecycler cfgs ref a valid IPv6 addr and port combination

[periklis]

What this PR does / why we need it:
Ensure that all constructors of LifeCyclerConfig are using net.JoinHostPort for instance addr and port combinations. This enables IPv6 usage compatible across the code based. Currently only distributors provide IPv6 compatibility because they use Lifecycler (that pulls the addr/port in the NewLifeCycler) while everything else uses BasicLifeCycler delegate this to the user defining an addr/port combination in LifecyclerConfig.

Which issue(s) this PR fixes:
Fixes #10884

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• CHANGELOG.md updated
  • If the change is worth mentioning in the release notes, add add-to-release-notes label
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
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[grafanabot]

Hello @periklis!
Backport pull requests need to be either:

• Pull requests which address bugs,
• Urgent fixes which need product approval, in order to get merged,
• Docs changes.

Please, if the current pull request addresses a bug fix, label it with the type/bug label.
If it already has the product approval, please add the product-approved label. For docs changes, please add the type/docs label.
If the pull request modifies CI behaviour, please add the type/ci label.
If none of the above applies, please consider removing the backport label and target the next major/minor release.
Thanks!

[dannykopping]

LGTM, thank you!