[Task]: Skip source code submission for enterprise add-on versions

[diox]

Description

Part of Enterprise Add-ons project.

Follow-up for #14849

In devhub, source code submission step should be skipped if the distribution mechanism is "enterprise". It should not be possible to submit source code for such versions (including after upload when editing the version in devhub page)

If that's easier the step could be shown with a message explaining that source code submission is not required for this channel, with the form to submit source code disabled.

Acceptance Criteria

  ### Acceptance Criteria
  - [ ] Source code is not required for enterprise versions
  - [ ] It should not be possible to submit source code for enterprise versions

Checks

• If the issue is ready to work on, I have removed the "needs:info" label.

┆Issue is synchronized with this Jira Task

[chrstinalin]

Completed in mozilla/addons-server#25160, followup mozilla/addons-server#25213

[ioanarusiczki]

Source code is not present.

Unlike the unlisted channel I see there is this extra step when uploading a new version https://addons-dev.allizom.org/en-US/developers/addon/an_addon_test/versions/submit/1818044/details

This is not present at addon create, it shows up when uploading a v2

[ioanarusiczki]

The rollback feature is not present for enterprise addons

[alexandruschek]

Hello!

I checked on DEV env, and the source submission page is not present for enterprise addons, while for past flow exists.

Thank you!