[landing] introduce competitor logo component

Summary:
Based on feedback in D7905 I created a lightweight wrapper component for all the competitor logos. I will update D7905 to use the new component.

Depends on D7945

Test Plan: Logos still rendered

Reviewers: atul, kamil

Reviewed By: atul

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D8015