Fixes [#30059](https://github.com/fleetdm/fleet/issues/30059)
Fixes an issue where you couldn't delete a bootstrap package. The issue
was an unused json struct tag for DryRun on the
`deleteBootstrapPackageRequest` struct.
I also updated the UI to use the current endpoint to delete a bootstrap
package
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- [x] Manual QA for all new/changed functionality