fix: Fix styling for Linode Entity Details body and footer

[coliu-akamai]

going to close this + reopen a new PR branching off of the release branch

Description 📝

• some padding/margins seem off for Linode entity details vs prod, potentially another regression from MUIv6. I tried fixing them to make it look like prod again ... hopefully!

No changeset needed - this hasn't hit prod yet
Potentially worth updating / simplifying styles for entity details one day

Target release date 🗓️

3/25

Preview 📷

	large	small screen
prod
before
after

How to test 🧪

Reproduction steps

• check out develop
• notice styling for Linode entity detail

Verification steps

• Confirm styling is fixed

Author Checklists

As an Author, to speed up the review process, I considered 🤔

👀 Doing a self review
❔ Our contribution guidelines
🤏 Splitting feature into small PRs
➕ Adding a changeset
🧪 Providing/improving test coverage
🔐 Removing all sensitive information from the code and PR description
🚩 Using a feature flag to protect the release
👣 Providing comprehensive reproduction steps
📑 Providing or updating our documentation
🕛 Scheduling a pair reviewing session
📱 Providing mobile support
♿ Providing accessibility support

• I have read and considered all applicable items listed above.

As an Author, before moving this PR from Draft to Open, I confirmed ✅

• All unit tests are passing
• TypeScript compilation succeeded without errors
• Code passes all linting rules

[linode-gh-bot]

Cloud Manager UI test results

🎉 539 passing tests on test run #1 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
0 Failing	539 Passing	3 Skipped	136m 8s