docs: order configuration template fileds alphabetically

[trevorwhitney]

What this PR does / why we need it:

Alphabetizes the order of fields in our auto-generated config doc.

[JStickler]

[Docs team] LGTM
<3

[grafanabot]

The backport to release-3.0.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-12771-to-release-3.0.x origin/release-3.0.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x 4404f7d2f723f7c5baa99873cf786df79ba80aa6

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-12771-to-release-3.0.x
# Create the PR body template
PR_BODY=$(gh pr view 12771 --json body --template 'Backport 4404f7d2f723f7c5baa99873cf786df79ba80aa6 from #12771{{ "\n\n---\n\n" }}{{ index . "body" }}')
# Create the PR on GitHub
echo "${PR_BODY}" | gh pr create --title "chore: [release-3.0.x] docs: order configuration template fileds alphabetically" --body-file - --label "size/XXL" --label "type/docs" --label "backport" --base release-3.0.x --milestone release-3.0.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-12771-to-release-3.0.x

# Create a pull request where the `base` branch is `release-3.0.x` and the `compare`/`head` branch is `backport-12771-to-release-3.0.x`.

# Remove the local backport branch
git switch main
git branch -D backport-12771-to-release-3.0.x