[landing] introduce new assetMetaData

Summary:
In preparation of repurposing the InfoBlocks to match the new designs, I reintroduced and updated the type for the assetMetaData array.

They copy for this file was copy and pasted from DES-74 and DES-75

Depends on D8077

Test Plan:
Please look at the screenshots below:

Keyserver info block:

Team info block:
No hover:

Hover over "Ashoat":

Reviewers: atul, kamil

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8078