fix(richtext-lexical): link drawer has no fields if parent document create access control is false

[AlessioGr]

Previously, the lexical link drawer did not display any fields if the create permission was false, even though the update permission was true.

The issue was a faulty permission check in RenderFields that did not check the top-level permission operation keys for truthiness. It only checked if the permissions variable itself was true, or if the sub-fields had create / update permissions set to true.