docs: resolve extra padding on tutorial editor

[bencodezen]

As of this commit, there is a visual discrepancy between the height of the content on the left compared to the separator and editors on the right. It appears that the cause of this is an additional computation of layout padding which is unnecessary for these particular elements.

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular/blob/main/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix: CSS styles on docs
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

There is a spacing discrepancy which you can see in the bottom right.

Issue Number: N/A

What is the new behavior?

It will remove the extra padding causing the gap.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[github-actions]

Deployed adev-preview for 4bcc7ec to: https://ng-dev-previews-fw--pr-angular-angular-54828-adev-prev-s56omp03.web.app

Note: As new commits are pushed to this pull request, this link is updated after the preview is rebuilt.