Remove `BFormInput` from `GlFormInput`

We should move logic from BFormInput directly into GlFormInput.

BootstrapVue props to support

TODO

BootstrapVue slots to support

none

BootstrapVue events to support

TODO

Important: when migrating double check https://peterhegman.gitlab.io/bootstrapvue-component-usage-breakdown/components.json to make sure we support all the props that are used.