fix(frontend): Remove extra page padding

[jenny-s51]

Description

In integrated mode, we want to mimic as much as possible other deployments.

Before (Integrated Mode):

Before (Standalone Mode):

After (Standalone Mode):

Target:

How Has This Been Tested?

1. Go to Model Registry list view and verify that styling and padding of the page component aligns with integrated mode.

Merge criteria:

• All the commits have been signed-off (To pass the DCO check)

• The commits have meaningful messages; the author will squash them after approval or in case of manual merges will ask to merge with squash.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work.
• Code changes follow the kubeflow contribution guidelines.

If you have UI changes

• The developer has added tests or explained why testing cannot be added.
• Included any necessary screenshots or gifs if it was a UI change.
• Verify that UI/UX changes conform the UX guidelines for Kubeflow.

[adysenrothman]

/lgtm

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[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: adysenrothman
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[jenny-s51]

Thanks for reviewing @lucferbux @adysenrothman !

@lucferbux fixed the margin styling based on your feedback - the resize should now work properly.