cellxgene-schema CLI must validate Visium Spatial Gene Expression and Slide-seqV2

[brianraymor]

I defer changing this issue to an epic and adding child issues to the Dev lead for schema 5.1.0. Generally, I prefer to track individual additions and updates, but Visium Spatial Gene Expression creates many interdependencies between fields so it may be simpler to address everything everywhere all at once

The changelog outlines the fields that have been added or updated:

• X (Matrix Layers)
  • Added Visium Spatial Gene Expression to the table of assays
• obs (Cell metadata)
  • Added array_col for Visium Spatial Gene Expression when uns['spatial']['is_single'] is True
  • Added array_row for Visium Spatial Gene Expression when uns['spatial']['is_single'] is True
  • Updated the requirements for cell_type_ontology_term_id for Visium Spatial Gene Expression when uns['spatial']['is_single'] is True. The value must be "unknown" if the corresponding value of in_tissue is 0.
  • Added in_tissue for Visium Spatial Gene Expression when uns['spatial']['is_single'] is True
  • Updated the requirements for self_reported_ethnicity_ontology_term_id. There must be no duplication of terms.
• obsm (Embeddings) APPLICATIONS IS RESPONSIBLE FOR OBSM
  • ~Added spatial for Visium Spatial Gene Expression and Slide-seqV2~
  • ~Updated requirements for X_{suffix}. {suffix} MUST NOT be "spatial".~
• uns (Dataset metadata)
  • Added spatial for Visium Spatial Gene Expression and Slide-seqV2, including scale factors and underlay images for Visium Spatial Gene Expression.

[brianraymor]

Decomposed into individual issues with dependencies.