Fix Inventory Result Scrolling (CRASM-2209)

[hawkishpolicy]

• Refactor DOM and CSS to allow scrolling of Result Cards if cursor is left or right of card list.

🗣 Description

• Users can now scroll if cursor is outside of the div.
• Pagination and Filter bar remain fixed.

💭 Motivation and context

• Closes CRASM-2209

🧪 Testing

• Tested locally

📷 Screenshots (if appropriate)

Screen.Recording.2025-04-08.at.1.05.03.PM.mov

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All new and existing tests pass.

✅ Pre-merge checklist

• Revert dependencies to default branches.
• Finalize version.

✅ Post-merge checklist

• Create a release.

[chrtorres]

LGTM

[nickviola]

LGTM

[rapidray12]

reviewed in a group meeting