CalloutContent: fix eslint-plugin-react-hooks TODOs

[ecraig12345]

#14478 enables eslint-plugin-react-hooks for react-next. There were a bunch of issues in CalloutContent which I wasn't quite sure how to handle. Since I'd like to get this in ASAP and Michael is OOF, for the time being I left TODO comments noting the issues and disabled the rule for those lines.

Before release these issues should be fixed properly: either add the missing hook deps (or related code changes), or add notes about why the rule is disabled and remove the TODO.

(There's also this TODO in FabricBase.)