makes a fix to the enroll byod handler. The hander use to be set once
when the server started but this lead to a user receiving a 404 page
after the fleet instance setup was complete but was not restarted.
now the `/enroll` handler will check for the setup requirement itself.
There is some error handling when the setup is required. if the fleet
instance has been setup, they will get the enroll byod page.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/Committing-Changes.md#changes-files)
for more information.
See https://github.com/fleetdm/fleet/actions/runs/10804752744 for the
failure. I changed a UI template in
https://github.com/fleetdm/fleet/pull/21957 yesterday that didn't
trigger the Go tests.
In this PR I'm just fixing the test failure, I will adjust the worker to
trigger a test run when this file is modified in a separate PR to not
block this on codeowners.
# Checklist for submitter
- [x] Added/updated tests
relates to #21559
This adds the ability for end users to enrol their own device in fleet
mdm.
> NOTE: this new byod HTML page is a separate HTML asset that contains
all styles and scripts needed for the page to work. We do not send the
fleet UI assets and this drastically cuts down the response time to the
users who will be visiting this page on mobile devices
There are two sides included in this:
**Adding a new add host modal ios and iPad section for IT admins**

**delivering a new byod HTML page to end users that will allow end users
to download the config profile to enrol into fleet mdm**

<!-- Note that API documentation changes are now addressed by the
product design team. -->
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/Committing-Changes.md#changes-files)
for more information.
- [ ] Added/updated tests
- [x] Manual QA for all new/changed functionality