Cannot link against intersphinx objects using roles with more than three colons

[AWhetter]

Intersphinx fails with an error when linking against :gql:enum:value:, :gql:input:field:, :gql:interface:field:, :gql:type:field: due to https://github.com/sphinx-doc/sphinx/blob/e439c6f33f8d8e7bc06b4f6f25dadfda74869ee0/sphinx/ext/intersphinx/_resolve.py#L393-L406.
Use sphinx.ext.intersphinx.InventoryAdapter(env) to do the intersphinx resolution in GraphQLDomain.resolve_xref.