docs: Add Azure example configuration snippets

[paul1r]

What this PR does / why we need it:
Adds configuration snippets related to Azure to the examples.

Which issue(s) this PR fixes:
Fixes #8301

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[JStickler]

[docs team] couple of suggestions to clean up the comments.

[JStickler]

[docs team] LGTM.

[grafanabot]

This PR must be merged before a backport PR will be created.

[grafanabot]

This PR must be merged before a backport PR will be created.

[grafanabot]

The backport to release-2.9.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-12725-to-release-2.9.x origin/release-2.9.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x afb4b604cd8f908d013f1741d3c7a07dd103dc63

When the conflicts are resolved, stage and commit the changes:

git add . && git cherry-pick --continue

If you have the GitHub CLI installed:

# Push the branch to GitHub:
git push --set-upstream origin backport-12725-to-release-2.9.x
# Create the PR body template
PR_BODY=$(gh pr view 12725 --json body --template 'Backport afb4b604cd8f908d013f1741d3c7a07dd103dc63 from #12725{{ "\n\n---\n\n" }}{{ index . "body" }}')
# Create the PR on GitHub
echo "${PR_BODY}" | gh pr create --title "chore: [release-2.9.x] docs: Add Azure example configuration snippets" --body-file - --label "size/M" --label "type/docs" --label "backport" --base release-2.9.x --milestone release-2.9.x --web

Or, if you don't have the GitHub CLI installed (we recommend you install it!):

# Push the branch to GitHub:
git push --set-upstream origin backport-12725-to-release-2.9.x

# Create a pull request where the `base` branch is `release-2.9.x` and the `compare`/`head` branch is `backport-12725-to-release-2.9.x`.

# Remove the local backport branch
git switch main
git branch -D backport-12725-to-release-2.9.x