feat(BulkSelect): expose menuToggle props

[katarinazaprazna]

Expose additional menuToggleProps in the component's API. This is necessary for the Content Services use case, as we need to programmatically disable the split button toggle.

[patternfly-build]

Preview: https://react-component-groups-pr-component-groups-824.surge.sh

A11y report: https://react-component-groups-pr-component-groups-824-a11y.surge.sh

[nicolethoen]

I have no objection to exposing the MenuToggleProps.

I'd rather not use that to replace the DropdownListProps, since that'd be a breaking change for anyone who may have possibly been using DropdowListProps. Could you make this an additive change and make sure both exposed props objects are being spread through correctly? rather than the replacement it currently is?

[katarinazaprazna]

That's a great point @nicolethoen, thanks for catching that. I hadn't considered it, especially since the props were requested by my team. I'll look into it :)