Use 0.28.1 build image and update go and alpine versions

[MichelHollands]

What this PR does / why we need it:

• Use the 0.28.1 build image
• Update Go version to 1.20.1
• Use Alpine 3.16.4
• Fix linter issues due to updated govet in 1.20.1
• Modify images to not create /etc/nsswitch.conf file anymore (available by default on Alpine 3.16.4)
• Remove impossible test cases for TestMemChunk_IteratorBounds(see Loki: Fix memchunk headblock filter #8591 (comment) for context)

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• CHANGELOG.md updated
• Changes that require user attention or interaction to upgrade are documented in docs/sources/upgrading/_index.md

[DylanGuedes]

nit but lgtm

[JStickler]

[Docs squad] Docs LGTM

[grafanabot]

Hello @DylanGuedes!
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 none of the above applies, please consider removing the backport label and target the next major/minor release.
Thanks!

[grafanabot]

The backport to release-2.7.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-8583-to-release-2.7.x origin/release-2.7.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x 4f8d3240f6ba1d203f4713fe4a7afe109bdb8ee1
# Push it to GitHub
git push --set-upstream origin backport-8583-to-release-2.7.x
git switch main
# Remove the local backport branch
git branch -D backport-8583-to-release-2.7.x

Then, create a pull request where the base branch is release-2.7.x and the compare/head branch is backport-8583-to-release-2.7.x.

[grafanabot]

The backport to release-2.7.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-8583-to-release-2.7.x origin/release-2.7.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x 4f8d3240f6ba1d203f4713fe4a7afe109bdb8ee1
# Push it to GitHub
git push --set-upstream origin backport-8583-to-release-2.7.x
git switch main
# Remove the local backport branch
git branch -D backport-8583-to-release-2.7.x

Then, create a pull request where the base branch is release-2.7.x and the compare/head branch is backport-8583-to-release-2.7.x.