[Atlas Pages] Complete Lung V1 Atlas pages

[NoopDog]

• [x] Remove the core atlas from the "Component Atlases" section
• [x] Update Component Atlases section as per new mocks with link to cellxgene and download
• [x] Add Analysis Portals Section with link to cellxgene collection https://cellxgene.cziscience.com/collections/8a072d7c-99cb-4112-83e3-6061165dd491
• [x] Collect remaining "Source Datasets"
• [x] Add remaining "Source Datasets"

TODO Dave

• [ ] new name for collections link
• [ ] modal for h5ad / rds

[frano-m]

See https://www.figma.com/file/i4uZsYkKAML9ivi2TIo6ug/HCA-Data-Explorer?type=design&node-id=5198-19411&mode=design&t=M7KtZAwjwwEuM5pv-4