[landing] made investor profile cards mobile friendly

Summary:
Will not land until all diffs in the stack are accepted

Investor cards are now mobile friendly with the profile pictures going above the text whenever the screen width is less than 600px

Next diffs:

1. Create Modal component for investor profile cards
2. Populate investor cards with data

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Linear Task: ENG-1953
Figma: Investor Page

Depends on D5328

Test Plan:
Please see attached video and screenshots to see how investor profile cards look/act:

iPhone 12 View:

Responsive Window View:

Reviewers: atul, ashoat, abosh, rohan

Reviewed By: atul, rohan

Subscribers: ashoat, tomek, atul, abosh

Differential Revision: https://phab.comm.dev/D5333